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Finding the Fourth Proportional to 429,399.39, 644,200.24 and 129,882.45

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Solution

The fourth proportional to 429,399.39, 644,200.24 and 129,882.45 is: 194,854.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,399.39 : 644,200.24 = 129,882.45 : x
  2. Step 2: Convert to fraction form
    429,399.39/644,200.24 = 129,882.45/x
  3. Step 3: Cross multiply
    429,399.39x = 644,200.24 × 129,882.45
  4. Step 4: Simplify right side
    429,399.39x = 83,670,307,796.36
  5. Step 5: Solve for x
    x = 83,670,307,796.36/429,399.39
  6. Step 6: Final answer
    x = 194,854.28

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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.