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Finding the Fourth Proportional to 1,744.64, 2,616.08 and 769.60

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Solution

The fourth proportional to 1,744.64, 2,616.08 and 769.60 is: 1,154.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,744.64 : 2,616.08 = 769.60 : x
  2. Step 2: Convert to fraction form
    1,744.64/2,616.08 = 769.60/x
  3. Step 3: Cross multiply
    1,744.64x = 2,616.08 × 769.60
  4. Step 4: Simplify right side
    1,744.64x = 2,013,335.17
  5. Step 5: Solve for x
    x = 2,013,335.17/1,744.64
  6. Step 6: Final answer
    x = 1,154.01

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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.