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Finding the Fourth Proportional to 898.87, 1,348.31 and 282.55

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Solution

The fourth proportional to 898.87, 1,348.31 and 282.55 is: 423.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.87 : 1,348.31 = 282.55 : x
  2. Step 2: Convert to fraction form
    898.87/1,348.31 = 282.55/x
  3. Step 3: Cross multiply
    898.87x = 1,348.31 × 282.55
  4. Step 4: Simplify right side
    898.87x = 380,964.99
  5. Step 5: Solve for x
    x = 380,964.99/898.87
  6. Step 6: Final answer
    x = 423.83

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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.