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Finding the Fourth Proportional to 972,988,869.67, 1,342,717,985.66 and 526,941,974.68

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Solution

The fourth proportional to 972,988,869.67, 1,342,717,985.66 and 526,941,974.68 is: 727,176,321.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    972,988,869.67 : 1,342,717,985.66 = 526,941,974.68 : x
  2. Step 2: Convert to fraction form
    972,988,869.67/1,342,717,985.66 = 526,941,974.68/x
  3. Step 3: Cross multiply
    972,988,869.67x = 1,342,717,985.66 × 526,941,974.68
  4. Step 4: Simplify right side
    972,988,869.67x = 707,534,466,796,040,832
  5. Step 5: Solve for x
    x = 707,534,466,796,040,832/972,988,869.67
  6. Step 6: Final answer
    x = 727,176,321.18

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Double scale
Find fourth proportional to 972,988,870.67, 1,342,717,987.03 and 526,941,975.68
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.