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Finding the Fourth Proportional to 727.52, 1,003.76 and 635.20

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Solution

The fourth proportional to 727.52, 1,003.76 and 635.20 is: 876.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.52 : 1,003.76 = 635.20 : x
  2. Step 2: Convert to fraction form
    727.52/1,003.76 = 635.20/x
  3. Step 3: Cross multiply
    727.52x = 1,003.76 × 635.20
  4. Step 4: Simplify right side
    727.52x = 637,588.35
  5. Step 5: Solve for x
    x = 637,588.35/727.52
  6. Step 6: Final answer
    x = 876.39

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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.