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Finding the Fourth Proportional to 874.55, 1,312.27 and 484.47

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Solution

The fourth proportional to 874.55, 1,312.27 and 484.47 is: 726.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    874.55 : 1,312.27 = 484.47 : x
  2. Step 2: Convert to fraction form
    874.55/1,312.27 = 484.47/x
  3. Step 3: Cross multiply
    874.55x = 1,312.27 × 484.47
  4. Step 4: Simplify right side
    874.55x = 635,754.24
  5. Step 5: Solve for x
    x = 635,754.24/874.55
  6. Step 6: Final answer
    x = 726.95

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Double scale
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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.