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Finding the Fourth Proportional to 925.61, 1,277.28 and 505.88

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Solution

The fourth proportional to 925.61, 1,277.28 and 505.88 is: 698.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.61 : 1,277.28 = 505.88 : x
  2. Step 2: Convert to fraction form
    925.61/1,277.28 = 505.88/x
  3. Step 3: Cross multiply
    925.61x = 1,277.28 × 505.88
  4. Step 4: Simplify right side
    925.61x = 646,144.02
  5. Step 5: Solve for x
    x = 646,144.02/925.61
  6. Step 6: Final answer
    x = 698.07

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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.