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Finding the Fourth Proportional to 976.97, 1,348.29 and 557.18

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Solution

The fourth proportional to 976.97, 1,348.29 and 557.18 is: 768.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    976.97 : 1,348.29 = 557.18 : x
  2. Step 2: Convert to fraction form
    976.97/1,348.29 = 557.18/x
  3. Step 3: Cross multiply
    976.97x = 1,348.29 × 557.18
  4. Step 4: Simplify right side
    976.97x = 751,240.22
  5. Step 5: Solve for x
    x = 751,240.22/976.97
  6. Step 6: Final answer
    x = 768.95

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.