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Finding the Fourth Proportional to 901.73, 1,349.66 and 489.85

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Solution

The fourth proportional to 901.73, 1,349.66 and 489.85 is: 733.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.73 : 1,349.66 = 489.85 : x
  2. Step 2: Convert to fraction form
    901.73/1,349.66 = 489.85/x
  3. Step 3: Cross multiply
    901.73x = 1,349.66 × 489.85
  4. Step 4: Simplify right side
    901.73x = 661,130.95
  5. Step 5: Solve for x
    x = 661,130.95/901.73
  6. Step 6: Final answer
    x = 733.18

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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.