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Finding the Fourth Proportional to 718,955.70, 992,151.63 and 396,668.04

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Solution

The fourth proportional to 718,955.70, 992,151.63 and 396,668.04 is: 547,397.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,955.70 : 992,151.63 = 396,668.04 : x
  2. Step 2: Convert to fraction form
    718,955.70/992,151.63 = 396,668.04/x
  3. Step 3: Cross multiply
    718,955.70x = 992,151.63 × 396,668.04
  4. Step 4: Simplify right side
    718,955.70x = 393,554,842,454.91
  5. Step 5: Solve for x
    x = 393,554,842,454.91/718,955.70
  6. Step 6: Final answer
    x = 547,397.90

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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.