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Finding the Fourth Proportional to 935,999.70, 1,403,999.55 and 780,479.70

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Solution

The fourth proportional to 935,999.70, 1,403,999.55 and 780,479.70 is: 1,170,719.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    935,999.70 : 1,403,999.55 = 780,479.70 : x
  2. Step 2: Convert to fraction form
    935,999.70/1,403,999.55 = 780,479.70/x
  3. Step 3: Cross multiply
    935,999.70x = 1,403,999.55 × 780,479.70
  4. Step 4: Simplify right side
    935,999.70x = 1,095,793,147,584.14
  5. Step 5: Solve for x
    x = 1,095,793,147,584.14/935,999.70
  6. Step 6: Final answer
    x = 1,170,719.55

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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.