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Finding the Fourth Proportional to 631.39, 947.03 and 214.88

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Solution

The fourth proportional to 631.39, 947.03 and 214.88 is: 322.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.39 : 947.03 = 214.88 : x
  2. Step 2: Convert to fraction form
    631.39/947.03 = 214.88/x
  3. Step 3: Cross multiply
    631.39x = 947.03 × 214.88
  4. Step 4: Simplify right side
    631.39x = 203,500.47
  5. Step 5: Solve for x
    x = 203,500.47/631.39
  6. Step 6: Final answer
    x = 322.31

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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.