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Finding the Fourth Proportional to 976.91, 1,348.14 and 534.85

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Solution

The fourth proportional to 976.91, 1,348.14 and 534.85 is: 738.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    976.91 : 1,348.14 = 534.85 : x
  2. Step 2: Convert to fraction form
    976.91/1,348.14 = 534.85/x
  3. Step 3: Cross multiply
    976.91x = 1,348.14 × 534.85
  4. Step 4: Simplify right side
    976.91x = 721,058.90
  5. Step 5: Solve for x
    x = 721,058.90/976.91
  6. Step 6: Final answer
    x = 738.10

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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.