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Finding the Fourth Proportional to 3,001.98, 4,502.88 and 921.90

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Solution

The fourth proportional to 3,001.98, 4,502.88 and 921.90 is: 1,382.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,001.98 : 4,502.88 = 921.90 : x
  2. Step 2: Convert to fraction form
    3,001.98/4,502.88 = 921.90/x
  3. Step 3: Cross multiply
    3,001.98x = 4,502.88 × 921.90
  4. Step 4: Simplify right side
    3,001.98x = 4,151,205.07
  5. Step 5: Solve for x
    x = 4,151,205.07/3,001.98
  6. Step 6: Final answer
    x = 1,382.82

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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.