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Finding the Fourth Proportional to 925.19, 1,387.78 and 377.22

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Solution

The fourth proportional to 925.19, 1,387.78 and 377.22 is: 565.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.19 : 1,387.78 = 377.22 : x
  2. Step 2: Convert to fraction form
    925.19/1,387.78 = 377.22/x
  3. Step 3: Cross multiply
    925.19x = 1,387.78 × 377.22
  4. Step 4: Simplify right side
    925.19x = 523,497.43
  5. Step 5: Solve for x
    x = 523,497.43/925.19
  6. Step 6: Final answer
    x = 565.83

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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.