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Finding the Fourth Proportional to 487,940,709.40, 731,239,217.70 and 323,711,589.40

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Solution

The fourth proportional to 487,940,709.40, 731,239,217.70 and 323,711,589.40 is: 485,121,665.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,940,709.40 : 731,239,217.70 = 323,711,589.40 : x
  2. Step 2: Convert to fraction form
    487,940,709.40/731,239,217.70 = 323,711,589.40/x
  3. Step 3: Cross multiply
    487,940,709.40x = 731,239,217.70 × 323,711,589.40
  4. Step 4: Simplify right side
    487,940,709.40x = 236,710,609,393,279,616
  5. Step 5: Solve for x
    x = 236,710,609,393,279,616/487,940,709.40
  6. Step 6: Final answer
    x = 485,121,665.06

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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.