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Finding the Fourth Proportional to 925.08, 1,276.20 and 715.32

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Solution

The fourth proportional to 925.08, 1,276.20 and 715.32 is: 986.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.08 : 1,276.20 = 715.32 : x
  2. Step 2: Convert to fraction form
    925.08/1,276.20 = 715.32/x
  3. Step 3: Cross multiply
    925.08x = 1,276.20 × 715.32
  4. Step 4: Simplify right side
    925.08x = 912,891.38
  5. Step 5: Solve for x
    x = 912,891.38/925.08
  6. Step 6: Final answer
    x = 986.82

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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.