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Finding the Fourth Proportional to 678,620, 936,610.84 and 392,306.08

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Solution

The fourth proportional to 678,620, 936,610.84 and 392,306.08 is: 541,449.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,620 : 936,610.84 = 392,306.08 : x
  2. Step 2: Convert to fraction form
    678,620/936,610.84 = 392,306.08/x
  3. Step 3: Cross multiply
    678,620x = 936,610.84 × 392,306.08
  4. Step 4: Simplify right side
    678,620x = 367,438,127,125.91
  5. Step 5: Solve for x
    x = 367,438,127,125.91/678,620
  6. Step 6: Final answer
    x = 541,449.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.