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Finding the Fourth Proportional to 631.24, 871.38 and 424.36

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Solution

The fourth proportional to 631.24, 871.38 and 424.36 is: 585.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.24 : 871.38 = 424.36 : x
  2. Step 2: Convert to fraction form
    631.24/871.38 = 424.36/x
  3. Step 3: Cross multiply
    631.24x = 871.38 × 424.36
  4. Step 4: Simplify right side
    631.24x = 369,778.82
  5. Step 5: Solve for x
    x = 369,778.82/631.24
  6. Step 6: Final answer
    x = 585.80

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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.