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Finding the Fourth Proportional to 613.97, 921.06 and 203.12

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Solution

The fourth proportional to 613.97, 921.06 and 203.12 is: 304.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.97 : 921.06 = 203.12 : x
  2. Step 2: Convert to fraction form
    613.97/921.06 = 203.12/x
  3. Step 3: Cross multiply
    613.97x = 921.06 × 203.12
  4. Step 4: Simplify right side
    613.97x = 187,085.71
  5. Step 5: Solve for x
    x = 187,085.71/613.97
  6. Step 6: Final answer
    x = 304.71

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Double scale
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Similar ratio
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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.