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Finding the Fourth Proportional to 631.41, 947.15 and 220.58

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Solution

The fourth proportional to 631.41, 947.15 and 220.58 is: 330.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.41 : 947.15 = 220.58 : x
  2. Step 2: Convert to fraction form
    631.41/947.15 = 220.58/x
  3. Step 3: Cross multiply
    631.41x = 947.15 × 220.58
  4. Step 4: Simplify right side
    631.41x = 208,921.71
  5. Step 5: Solve for x
    x = 208,921.71/631.41
  6. Step 6: Final answer
    x = 330.88

Related Problems

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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.