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Finding the Fourth Proportional to 1,744.12, 2,615.91 and 648.19

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Solution

The fourth proportional to 1,744.12, 2,615.91 and 648.19 is: 972.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,744.12 : 2,615.91 = 648.19 : x
  2. Step 2: Convert to fraction form
    1,744.12/2,615.91 = 648.19/x
  3. Step 3: Cross multiply
    1,744.12x = 2,615.91 × 648.19
  4. Step 4: Simplify right side
    1,744.12x = 1,695,606.70
  5. Step 5: Solve for x
    x = 1,695,606.70/1,744.12
  6. Step 6: Final answer
    x = 972.18

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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.