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Finding the Fourth Proportional to 631.52, 947.55 and 400.67

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Solution

The fourth proportional to 631.52, 947.55 and 400.67 is: 601.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.52 : 947.55 = 400.67 : x
  2. Step 2: Convert to fraction form
    631.52/947.55 = 400.67/x
  3. Step 3: Cross multiply
    631.52x = 947.55 × 400.67
  4. Step 4: Simplify right side
    631.52x = 379,654.86
  5. Step 5: Solve for x
    x = 379,654.86/631.52
  6. Step 6: Final answer
    x = 601.18

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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.