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Finding the Fourth Proportional to 709,687,884.60, 979,348,662.36 and 392,143,084.92

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Solution

The fourth proportional to 709,687,884.60, 979,348,662.36 and 392,143,084.92 is: 541,146,064.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,687,884.60 : 979,348,662.36 = 392,143,084.92 : x
  2. Step 2: Convert to fraction form
    709,687,884.60/979,348,662.36 = 392,143,084.92/x
  3. Step 3: Cross multiply
    709,687,884.60x = 979,348,662.36 × 392,143,084.92
  4. Step 4: Simplify right side
    709,687,884.60x = 384,044,805,670,125,888
  5. Step 5: Solve for x
    x = 384,044,805,670,125,888/709,687,884.60
  6. Step 6: Final answer
    x = 541,146,064.35

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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.