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Finding the Fourth Proportional to 871.47, 1,306.26 and 377.64

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Solution

The fourth proportional to 871.47, 1,306.26 and 377.64 is: 566.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    871.47 : 1,306.26 = 377.64 : x
  2. Step 2: Convert to fraction form
    871.47/1,306.26 = 377.64/x
  3. Step 3: Cross multiply
    871.47x = 1,306.26 × 377.64
  4. Step 4: Simplify right side
    871.47x = 493,296.03
  5. Step 5: Solve for x
    x = 493,296.03/871.47
  6. Step 6: Final answer
    x = 566.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.