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Finding the Fourth Proportional to 1,985,796.81, 2,976,077.16 and 787,065.66

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Solution

The fourth proportional to 1,985,796.81, 2,976,077.16 and 787,065.66 is: 1,179,560.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985,796.81 : 2,976,077.16 = 787,065.66 : x
  2. Step 2: Convert to fraction form
    1,985,796.81/2,976,077.16 = 787,065.66/x
  3. Step 3: Cross multiply
    1,985,796.81x = 2,976,077.16 × 787,065.66
  4. Step 4: Simplify right side
    1,985,796.81x = 2,342,368,134,146.33
  5. Step 5: Solve for x
    x = 2,342,368,134,146.33/1,985,796.81
  6. Step 6: Final answer
    x = 1,179,560.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.