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Finding the Fourth Proportional to 612.49, 918.78 and 247.24

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Solution

The fourth proportional to 612.49, 918.78 and 247.24 is: 370.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.49 : 918.78 = 247.24 : x
  2. Step 2: Convert to fraction form
    612.49/918.78 = 247.24/x
  3. Step 3: Cross multiply
    612.49x = 918.78 × 247.24
  4. Step 4: Simplify right side
    612.49x = 227,159.17
  5. Step 5: Solve for x
    x = 227,159.17/612.49
  6. Step 6: Final answer
    x = 370.88

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Double scale
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Similar ratio
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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.