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Finding the Fourth Proportional to 925.56, 1,277.26 and 505.91

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Solution

The fourth proportional to 925.56, 1,277.26 and 505.91 is: 698.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.56 : 1,277.26 = 505.91 : x
  2. Step 2: Convert to fraction form
    925.56/1,277.26 = 505.91/x
  3. Step 3: Cross multiply
    925.56x = 1,277.26 × 505.91
  4. Step 4: Simplify right side
    925.56x = 646,178.61
  5. Step 5: Solve for x
    x = 646,178.61/925.56
  6. Step 6: Final answer
    x = 698.15

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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.