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Finding the Fourth Proportional to 631.53, 871.20 and 483.91

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Solution

The fourth proportional to 631.53, 871.20 and 483.91 is: 667.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.53 : 871.20 = 483.91 : x
  2. Step 2: Convert to fraction form
    631.53/871.20 = 483.91/x
  3. Step 3: Cross multiply
    631.53x = 871.20 × 483.91
  4. Step 4: Simplify right side
    631.53x = 421,580.21
  5. Step 5: Solve for x
    x = 421,580.21/631.53
  6. Step 6: Final answer
    x = 667.55

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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.