Home / 429,463.20-644,030.78-129,844.20

Finding the Fourth Proportional to 429,463.20, 644,030.78 and 129,844.20

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Solution

The fourth proportional to 429,463.20, 644,030.78 and 129,844.20 is: 194,716.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,463.20 : 644,030.78 = 129,844.20 : x
  2. Step 2: Convert to fraction form
    429,463.20/644,030.78 = 129,844.20/x
  3. Step 3: Cross multiply
    429,463.20x = 644,030.78 × 129,844.20
  4. Step 4: Simplify right side
    429,463.20x = 83,623,660,755.26
  5. Step 5: Solve for x
    x = 83,623,660,755.26/429,463.20
  6. Step 6: Final answer
    x = 194,716.71

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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.