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Finding the Fourth Proportional to 702,951.20, 1,053,649.20 and 387,634.40

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Solution

The fourth proportional to 702,951.20, 1,053,649.20 and 387,634.40 is: 581,022.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    702,951.20 : 1,053,649.20 = 387,634.40 : x
  2. Step 2: Convert to fraction form
    702,951.20/1,053,649.20 = 387,634.40/x
  3. Step 3: Cross multiply
    702,951.20x = 1,053,649.20 × 387,634.40
  4. Step 4: Simplify right side
    702,951.20x = 408,430,675,452.48
  5. Step 5: Solve for x
    x = 408,430,675,452.48/702,951.20
  6. Step 6: Final answer
    x = 581,022.80

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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.