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Finding the Fourth Proportional to 1,001.96, 1,383.13 and 687.12

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Solution

The fourth proportional to 1,001.96, 1,383.13 and 687.12 is: 948.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,001.96 : 1,383.13 = 687.12 : x
  2. Step 2: Convert to fraction form
    1,001.96/1,383.13 = 687.12/x
  3. Step 3: Cross multiply
    1,001.96x = 1,383.13 × 687.12
  4. Step 4: Simplify right side
    1,001.96x = 950,376.29
  5. Step 5: Solve for x
    x = 950,376.29/1,001.96
  6. Step 6: Final answer
    x = 948.52

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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.