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Finding the Fourth Proportional to 898.92, 1,240.38 and 500.58

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Solution

The fourth proportional to 898.92, 1,240.38 and 500.58 is: 690.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.92 : 1,240.38 = 500.58 : x
  2. Step 2: Convert to fraction form
    898.92/1,240.38 = 500.58/x
  3. Step 3: Cross multiply
    898.92x = 1,240.38 × 500.58
  4. Step 4: Simplify right side
    898.92x = 620,909.42
  5. Step 5: Solve for x
    x = 620,909.42/898.92
  6. Step 6: Final answer
    x = 690.73

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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.