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Finding the Fourth Proportional to 631.49, 947.67 and 353.55

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Solution

The fourth proportional to 631.49, 947.67 and 353.55 is: 530.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.49 : 947.67 = 353.55 : x
  2. Step 2: Convert to fraction form
    631.49/947.67 = 353.55/x
  3. Step 3: Cross multiply
    631.49x = 947.67 × 353.55
  4. Step 4: Simplify right side
    631.49x = 335,048.73
  5. Step 5: Solve for x
    x = 335,048.73/631.49
  6. Step 6: Final answer
    x = 530.57

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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.