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Finding the Fourth Proportional to 925.59, 1,388.52 and 560.55

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Solution

The fourth proportional to 925.59, 1,388.52 and 560.55 is: 840.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.59 : 1,388.52 = 560.55 : x
  2. Step 2: Convert to fraction form
    925.59/1,388.52 = 560.55/x
  3. Step 3: Cross multiply
    925.59x = 1,388.52 × 560.55
  4. Step 4: Simplify right side
    925.59x = 778,334.89
  5. Step 5: Solve for x
    x = 778,334.89/925.59
  6. Step 6: Final answer
    x = 840.91

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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.