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Finding the Fourth Proportional to 1,066.78, 1,600.58 and 489.25

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Solution

The fourth proportional to 1,066.78, 1,600.58 and 489.25 is: 734.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,066.78 : 1,600.58 = 489.25 : x
  2. Step 2: Convert to fraction form
    1,066.78/1,600.58 = 489.25/x
  3. Step 3: Cross multiply
    1,066.78x = 1,600.58 × 489.25
  4. Step 4: Simplify right side
    1,066.78x = 783,083.77
  5. Step 5: Solve for x
    x = 783,083.77/1,066.78
  6. Step 6: Final answer
    x = 734.06

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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.