Home / 429,207.50-643,655.73-192,428.30

Finding the Fourth Proportional to 429,207.50, 643,655.73 and 192,428.30

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Solution

The fourth proportional to 429,207.50, 643,655.73 and 192,428.30 is: 288,572.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,207.50 : 643,655.73 = 192,428.30 : x
  2. Step 2: Convert to fraction form
    429,207.50/643,655.73 = 192,428.30/x
  3. Step 3: Cross multiply
    429,207.50x = 643,655.73 × 192,428.30
  4. Step 4: Simplify right side
    429,207.50x = 123,857,577,909.16
  5. Step 5: Solve for x
    x = 123,857,577,909.16/429,207.50
  6. Step 6: Final answer
    x = 288,572.73

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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.