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Finding the Fourth Proportional to 734.36, 1,098.66 and 489.72

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Solution

The fourth proportional to 734.36, 1,098.66 and 489.72 is: 732.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    734.36 : 1,098.66 = 489.72 : x
  2. Step 2: Convert to fraction form
    734.36/1,098.66 = 489.72/x
  3. Step 3: Cross multiply
    734.36x = 1,098.66 × 489.72
  4. Step 4: Simplify right side
    734.36x = 538,035.78
  5. Step 5: Solve for x
    x = 538,035.78/734.36
  6. Step 6: Final answer
    x = 732.66

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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.