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Finding the Fourth Proportional to 631.88, 872.01 and 369.89

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Solution

The fourth proportional to 631.88, 872.01 and 369.89 is: 510.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.88 : 872.01 = 369.89 : x
  2. Step 2: Convert to fraction form
    631.88/872.01 = 369.89/x
  3. Step 3: Cross multiply
    631.88x = 872.01 × 369.89
  4. Step 4: Simplify right side
    631.88x = 322,543.42
  5. Step 5: Solve for x
    x = 322,543.42/631.88
  6. Step 6: Final answer
    x = 510.45

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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.