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Finding the Fourth Proportional to 969.68, 1,337.92 and 549.96

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Solution

The fourth proportional to 969.68, 1,337.92 and 549.96 is: 758.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    969.68 : 1,337.92 = 549.96 : x
  2. Step 2: Convert to fraction form
    969.68/1,337.92 = 549.96/x
  3. Step 3: Cross multiply
    969.68x = 1,337.92 × 549.96
  4. Step 4: Simplify right side
    969.68x = 735,802.48
  5. Step 5: Solve for x
    x = 735,802.48/969.68
  6. Step 6: Final answer
    x = 758.81

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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.