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Finding the Fourth Proportional to 631.34, 871.36 and 365.74

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Solution

The fourth proportional to 631.34, 871.36 and 365.74 is: 504.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.34 : 871.36 = 365.74 : x
  2. Step 2: Convert to fraction form
    631.34/871.36 = 365.74/x
  3. Step 3: Cross multiply
    631.34x = 871.36 × 365.74
  4. Step 4: Simplify right side
    631.34x = 318,688.11
  5. Step 5: Solve for x
    x = 318,688.11/631.34
  6. Step 6: Final answer
    x = 504.78

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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.