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Finding the Fourth Proportional to 661,659,591.60, 992,701,963.80 and 443,556,205.20

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Solution

The fourth proportional to 661,659,591.60, 992,701,963.80 and 443,556,205.20 is: 665,476,812.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,659,591.60 : 992,701,963.80 = 443,556,205.20 : x
  2. Step 2: Convert to fraction form
    661,659,591.60/992,701,963.80 = 443,556,205.20/x
  3. Step 3: Cross multiply
    661,659,591.60x = 992,701,963.80 × 443,556,205.20
  4. Step 4: Simplify right side
    661,659,591.60x = 440,319,115,957,715,712
  5. Step 5: Solve for x
    x = 440,319,115,957,715,712/661,659,591.60
  6. Step 6: Final answer
    x = 665,476,812.47

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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.