Home / 678,731.24-1,016,920.86-411,932.72

Finding the Fourth Proportional to 678,731.24, 1,016,920.86 and 411,932.72

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Solution

The fourth proportional to 678,731.24, 1,016,920.86 and 411,932.72 is: 617,185.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,731.24 : 1,016,920.86 = 411,932.72 : x
  2. Step 2: Convert to fraction form
    678,731.24/1,016,920.86 = 411,932.72/x
  3. Step 3: Cross multiply
    678,731.24x = 1,016,920.86 × 411,932.72
  4. Step 4: Simplify right side
    678,731.24x = 418,902,970,799.94
  5. Step 5: Solve for x
    x = 418,902,970,799.94/678,731.24
  6. Step 6: Final answer
    x = 617,185.34

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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.