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Finding the Fourth Proportional to 3,512.27, 5,268.41 and 915

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Solution

The fourth proportional to 3,512.27, 5,268.41 and 915 is: 1,372.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,512.27 : 5,268.41 = 915 : x
  2. Step 2: Convert to fraction form
    3,512.27/5,268.41 = 915/x
  3. Step 3: Cross multiply
    3,512.27x = 5,268.41 × 915
  4. Step 4: Simplify right side
    3,512.27x = 4,820,590.58
  5. Step 5: Solve for x
    x = 4,820,590.58/3,512.27
  6. Step 6: Final answer
    x = 1,372.50

Related Problems

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Double scale
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Similar ratio
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1.5x scale

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.