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Finding the Fourth Proportional to 709,627.28, 979,300.68 and 403,693.52

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Solution

The fourth proportional to 709,627.28, 979,300.68 and 403,693.52 is: 557,105.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,627.28 : 979,300.68 = 403,693.52 : x
  2. Step 2: Convert to fraction form
    709,627.28/979,300.68 = 403,693.52/x
  3. Step 3: Cross multiply
    709,627.28x = 979,300.68 × 403,693.52
  4. Step 4: Simplify right side
    709,627.28x = 395,337,338,647.59
  5. Step 5: Solve for x
    x = 395,337,338,647.59/709,627.28
  6. Step 6: Final answer
    x = 557,105.61

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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.