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Finding the Fourth Proportional to 631.10, 947.55 and 494.30

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Solution

The fourth proportional to 631.10, 947.55 and 494.30 is: 742.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.10 : 947.55 = 494.30 : x
  2. Step 2: Convert to fraction form
    631.10/947.55 = 494.30/x
  3. Step 3: Cross multiply
    631.10x = 947.55 × 494.30
  4. Step 4: Simplify right side
    631.10x = 468,373.97
  5. Step 5: Solve for x
    x = 468,373.97/631.10
  6. Step 6: Final answer
    x = 742.15

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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.