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Finding the Fourth Proportional to 631.52, 947.76 and 266.60

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Solution

The fourth proportional to 631.52, 947.76 and 266.60 is: 400.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.52 : 947.76 = 266.60 : x
  2. Step 2: Convert to fraction form
    631.52/947.76 = 266.60/x
  3. Step 3: Cross multiply
    631.52x = 947.76 × 266.60
  4. Step 4: Simplify right side
    631.52x = 252,668.08
  5. Step 5: Solve for x
    x = 252,668.08/631.52
  6. Step 6: Final answer
    x = 400.10

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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.