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Finding the Fourth Proportional to 631.68, 871.68 and 369.69

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Solution

The fourth proportional to 631.68, 871.68 and 369.69 is: 510.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.68 : 871.68 = 369.69 : x
  2. Step 2: Convert to fraction form
    631.68/871.68 = 369.69/x
  3. Step 3: Cross multiply
    631.68x = 871.68 × 369.69
  4. Step 4: Simplify right side
    631.68x = 322,251.38
  5. Step 5: Solve for x
    x = 322,251.38/631.68
  6. Step 6: Final answer
    x = 510.15

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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.