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Finding the Fourth Proportional to 661,569,807.90, 992,354,711.85 and 443,324,703.90

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Solution

The fourth proportional to 661,569,807.90, 992,354,711.85 and 443,324,703.90 is: 664,987,055.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,569,807.90 : 992,354,711.85 = 443,324,703.90 : x
  2. Step 2: Convert to fraction form
    661,569,807.90/992,354,711.85 = 443,324,703.90/x
  3. Step 3: Cross multiply
    661,569,807.90x = 992,354,711.85 × 443,324,703.90
  4. Step 4: Simplify right side
    661,569,807.90x = 439,935,358,794,671,040
  5. Step 5: Solve for x
    x = 439,935,358,794,671,040/661,569,807.90
  6. Step 6: Final answer
    x = 664,987,055.85

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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.