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Finding the Fourth Proportional to 1,066.82, 1,600.14 and 489.70

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Solution

The fourth proportional to 1,066.82, 1,600.14 and 489.70 is: 734.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,066.82 : 1,600.14 = 489.70 : x
  2. Step 2: Convert to fraction form
    1,066.82/1,600.14 = 489.70/x
  3. Step 3: Cross multiply
    1,066.82x = 1,600.14 × 489.70
  4. Step 4: Simplify right side
    1,066.82x = 783,580.56
  5. Step 5: Solve for x
    x = 783,580.56/1,066.82
  6. Step 6: Final answer
    x = 734.50

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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.