Home / 856,436.40-1,283,691.84-406,789.20

Finding the Fourth Proportional to 856,436.40, 1,283,691.84 and 406,789.20

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Solution

The fourth proportional to 856,436.40, 1,283,691.84 and 406,789.20 is: 609,726.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    856,436.40 : 1,283,691.84 = 406,789.20 : x
  2. Step 2: Convert to fraction form
    856,436.40/1,283,691.84 = 406,789.20/x
  3. Step 3: Cross multiply
    856,436.40x = 1,283,691.84 × 406,789.20
  4. Step 4: Simplify right side
    856,436.40x = 522,191,976,640.13
  5. Step 5: Solve for x
    x = 522,191,976,640.13/856,436.40
  6. Step 6: Final answer
    x = 609,726.51

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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.