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Finding the Fourth Proportional to 521,519.40, 782,279.10 and 472,530.60

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Solution

The fourth proportional to 521,519.40, 782,279.10 and 472,530.60 is: 708,795.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,519.40 : 782,279.10 = 472,530.60 : x
  2. Step 2: Convert to fraction form
    521,519.40/782,279.10 = 472,530.60/x
  3. Step 3: Cross multiply
    521,519.40x = 782,279.10 × 472,530.60
  4. Step 4: Simplify right side
    521,519.40x = 369,650,812,490.46
  5. Step 5: Solve for x
    x = 369,650,812,490.46/521,519.40
  6. Step 6: Final answer
    x = 708,795.90

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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.