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Finding the Fourth Proportional to 1,480.12, 2,220.69 and 658.97

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Solution

The fourth proportional to 1,480.12, 2,220.69 and 658.97 is: 988.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,480.12 : 2,220.69 = 658.97 : x
  2. Step 2: Convert to fraction form
    1,480.12/2,220.69 = 658.97/x
  3. Step 3: Cross multiply
    1,480.12x = 2,220.69 × 658.97
  4. Step 4: Simplify right side
    1,480.12x = 1,463,368.09
  5. Step 5: Solve for x
    x = 1,463,368.09/1,480.12
  6. Step 6: Final answer
    x = 988.68

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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.