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Finding the Fourth Proportional to 898.96, 1,240.88 and 549.68

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Solution

The fourth proportional to 898.96, 1,240.88 and 549.68 is: 758.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.96 : 1,240.88 = 549.68 : x
  2. Step 2: Convert to fraction form
    898.96/1,240.88 = 549.68/x
  3. Step 3: Cross multiply
    898.96x = 1,240.88 × 549.68
  4. Step 4: Simplify right side
    898.96x = 682,086.92
  5. Step 5: Solve for x
    x = 682,086.92/898.96
  6. Step 6: Final answer
    x = 758.75

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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.