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Finding the Fourth Proportional to 631.68, 871.18 and 500.46

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Solution

The fourth proportional to 631.68, 871.18 and 500.46 is: 690.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.68 : 871.18 = 500.46 : x
  2. Step 2: Convert to fraction form
    631.68/871.18 = 500.46/x
  3. Step 3: Cross multiply
    631.68x = 871.18 × 500.46
  4. Step 4: Simplify right side
    631.68x = 435,990.74
  5. Step 5: Solve for x
    x = 435,990.74/631.68
  6. Step 6: Final answer
    x = 690.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.