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Finding the Fourth Proportional to 847.57, 1,271.14 and 575.35

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Solution

The fourth proportional to 847.57, 1,271.14 and 575.35 is: 862.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    847.57 : 1,271.14 = 575.35 : x
  2. Step 2: Convert to fraction form
    847.57/1,271.14 = 575.35/x
  3. Step 3: Cross multiply
    847.57x = 1,271.14 × 575.35
  4. Step 4: Simplify right side
    847.57x = 731,350.40
  5. Step 5: Solve for x
    x = 731,350.40/847.57
  6. Step 6: Final answer
    x = 862.88

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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.