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Finding the Fourth Proportional to 1,001.90, 1,382.00 and 648.27

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Solution

The fourth proportional to 1,001.90, 1,382.00 and 648.27 is: 894.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,001.90 : 1,382.00 = 648.27 : x
  2. Step 2: Convert to fraction form
    1,001.90/1,382.00 = 648.27/x
  3. Step 3: Cross multiply
    1,001.90x = 1,382.00 × 648.27
  4. Step 4: Simplify right side
    1,001.90x = 895,905.90
  5. Step 5: Solve for x
    x = 895,905.90/1,001.90
  6. Step 6: Final answer
    x = 894.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.