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Finding the Fourth Proportional to 1,744.80, 2,617.60 and 770.91

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Solution

The fourth proportional to 1,744.80, 2,617.60 and 770.91 is: 1,156.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,744.80 : 2,617.60 = 770.91 : x
  2. Step 2: Convert to fraction form
    1,744.80/2,617.60 = 770.91/x
  3. Step 3: Cross multiply
    1,744.80x = 2,617.60 × 770.91
  4. Step 4: Simplify right side
    1,744.80x = 2,017,934.02
  5. Step 5: Solve for x
    x = 2,017,934.02/1,744.80
  6. Step 6: Final answer
    x = 1,156.54

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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.