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Finding the Fourth Proportional to 631.55, 871.63 and 483.93

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Solution

The fourth proportional to 631.55, 871.63 and 483.93 is: 667.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.55 : 871.63 = 483.93 : x
  2. Step 2: Convert to fraction form
    631.55/871.63 = 483.93/x
  3. Step 3: Cross multiply
    631.55x = 871.63 × 483.93
  4. Step 4: Simplify right side
    631.55x = 421,806.70
  5. Step 5: Solve for x
    x = 421,806.70/631.55
  6. Step 6: Final answer
    x = 667.89

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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.