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Finding the Fourth Proportional to 631.49, 947.36 and 266.27

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Solution

The fourth proportional to 631.49, 947.36 and 266.27 is: 399.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.49 : 947.36 = 266.27 : x
  2. Step 2: Convert to fraction form
    631.49/947.36 = 266.27/x
  3. Step 3: Cross multiply
    631.49x = 947.36 × 266.27
  4. Step 4: Simplify right side
    631.49x = 252,257.36
  5. Step 5: Solve for x
    x = 252,257.36/631.49
  6. Step 6: Final answer
    x = 399.47

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Double scale
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1.5x scale

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.