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Finding the Fourth Proportional to 748.38, 1,033.02 and 486.48

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Solution

The fourth proportional to 748.38, 1,033.02 and 486.48 is: 671.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    748.38 : 1,033.02 = 486.48 : x
  2. Step 2: Convert to fraction form
    748.38/1,033.02 = 486.48/x
  3. Step 3: Cross multiply
    748.38x = 1,033.02 × 486.48
  4. Step 4: Simplify right side
    748.38x = 502,543.57
  5. Step 5: Solve for x
    x = 502,543.57/748.38
  6. Step 6: Final answer
    x = 671.51

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Half scale
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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.