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Finding the Fourth Proportional to 925.38, 1,275.80 and 767.42

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Solution

The fourth proportional to 925.38, 1,275.80 and 767.42 is: 1,058.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.38 : 1,275.80 = 767.42 : x
  2. Step 2: Convert to fraction form
    925.38/1,275.80 = 767.42/x
  3. Step 3: Cross multiply
    925.38x = 1,275.80 × 767.42
  4. Step 4: Simplify right side
    925.38x = 979,074.44
  5. Step 5: Solve for x
    x = 979,074.44/925.38
  6. Step 6: Final answer
    x = 1,058.02

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Double scale
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1.5x scale

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.