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Finding the Fourth Proportional to 718,279.92, 991,262.88 and 412,354.08

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Solution

The fourth proportional to 718,279.92, 991,262.88 and 412,354.08 is: 569,069.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,279.92 : 991,262.88 = 412,354.08 : x
  2. Step 2: Convert to fraction form
    718,279.92/991,262.88 = 412,354.08/x
  3. Step 3: Cross multiply
    718,279.92x = 991,262.88 × 412,354.08
  4. Step 4: Simplify right side
    718,279.92x = 408,751,292,920.55
  5. Step 5: Solve for x
    x = 408,751,292,920.55/718,279.92
  6. Step 6: Final answer
    x = 569,069.64

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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.