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Finding the Fourth Proportional to 718,954.20, 992,149.56 and 396,666.54

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Solution

The fourth proportional to 718,954.20, 992,149.56 and 396,666.54 is: 547,395.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,954.20 : 992,149.56 = 396,666.54 : x
  2. Step 2: Convert to fraction form
    718,954.20/992,149.56 = 396,666.54/x
  3. Step 3: Cross multiply
    718,954.20x = 992,149.56 × 396,666.54
  4. Step 4: Simplify right side
    718,954.20x = 393,552,533,127.72
  5. Step 5: Solve for x
    x = 393,552,533,127.72/718,954.20
  6. Step 6: Final answer
    x = 547,395.83

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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.