Home / 429,211-643,606.98-129,634.12

Finding the Fourth Proportional to 429,211, 643,606.98 and 129,634.12

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Solution

The fourth proportional to 429,211, 643,606.98 and 129,634.12 is: 194,387.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,211 : 643,606.98 = 129,634.12 : x
  2. Step 2: Convert to fraction form
    429,211/643,606.98 = 129,634.12/x
  3. Step 3: Cross multiply
    429,211x = 643,606.98 × 129,634.12
  4. Step 4: Simplify right side
    429,211x = 83,433,424,478.16
  5. Step 5: Solve for x
    x = 83,433,424,478.16/429,211
  6. Step 6: Final answer
    x = 194,387.90

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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.