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Finding the Fourth Proportional to 925.53, 1,388.15 and 309.23

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Solution

The fourth proportional to 925.53, 1,388.15 and 309.23 is: 463.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.53 : 1,388.15 = 309.23 : x
  2. Step 2: Convert to fraction form
    925.53/1,388.15 = 309.23/x
  3. Step 3: Cross multiply
    925.53x = 1,388.15 × 309.23
  4. Step 4: Simplify right side
    925.53x = 429,257.62
  5. Step 5: Solve for x
    x = 429,257.62/925.53
  6. Step 6: Final answer
    x = 463.80

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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.