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Finding the Fourth Proportional to 875.20, 1,310.20 and 566.15

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Solution

The fourth proportional to 875.20, 1,310.20 and 566.15 is: 847.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    875.20 : 1,310.20 = 566.15 : x
  2. Step 2: Convert to fraction form
    875.20/1,310.20 = 566.15/x
  3. Step 3: Cross multiply
    875.20x = 1,310.20 × 566.15
  4. Step 4: Simplify right side
    875.20x = 741,769.73
  5. Step 5: Solve for x
    x = 741,769.73/875.20
  6. Step 6: Final answer
    x = 847.54

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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.