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Finding the Fourth Proportional to 709,996,839.62, 979,892,971.72 and 408,575,956.56

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Solution

The fourth proportional to 709,996,839.62, 979,892,971.72 and 408,575,956.56 is: 563,890,831.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,996,839.62 : 979,892,971.72 = 408,575,956.56 : x
  2. Step 2: Convert to fraction form
    709,996,839.62/979,892,971.72 = 408,575,956.56/x
  3. Step 3: Cross multiply
    709,996,839.62x = 979,892,971.72 × 408,575,956.56
  4. Step 4: Simplify right side
    709,996,839.62x = 400,360,708,246,920,064
  5. Step 5: Solve for x
    x = 400,360,708,246,920,064/709,996,839.62
  6. Step 6: Final answer
    x = 563,890,831.49

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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.