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Finding the Fourth Proportional to 631.35, 871.43 and 565.74

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Solution

The fourth proportional to 631.35, 871.43 and 565.74 is: 780.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.35 : 871.43 = 565.74 : x
  2. Step 2: Convert to fraction form
    631.35/871.43 = 565.74/x
  3. Step 3: Cross multiply
    631.35x = 871.43 × 565.74
  4. Step 4: Simplify right side
    631.35x = 492,999.98
  5. Step 5: Solve for x
    x = 492,999.98/631.35
  6. Step 6: Final answer
    x = 780.87

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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.