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Finding the Fourth Proportional to 1,450.28, 2,001.84 and 978.86

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Solution

The fourth proportional to 1,450.28, 2,001.84 and 978.86 is: 1,351.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,450.28 : 2,001.84 = 978.86 : x
  2. Step 2: Convert to fraction form
    1,450.28/2,001.84 = 978.86/x
  3. Step 3: Cross multiply
    1,450.28x = 2,001.84 × 978.86
  4. Step 4: Simplify right side
    1,450.28x = 1,959,521.10
  5. Step 5: Solve for x
    x = 1,959,521.10/1,450.28
  6. Step 6: Final answer
    x = 1,351.13

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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.