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Finding the Fourth Proportional to 925.48, 1,388.52 and 309.21

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Solution

The fourth proportional to 925.48, 1,388.52 and 309.21 is: 463.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.48 : 1,388.52 = 309.21 : x
  2. Step 2: Convert to fraction form
    925.48/1,388.52 = 309.21/x
  3. Step 3: Cross multiply
    925.48x = 1,388.52 × 309.21
  4. Step 4: Simplify right side
    925.48x = 429,344.27
  5. Step 5: Solve for x
    x = 429,344.27/925.48
  6. Step 6: Final answer
    x = 463.92

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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.