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Finding the Fourth Proportional to 1,744.84, 2,619.42 and 771.40

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Solution

The fourth proportional to 1,744.84, 2,619.42 and 771.40 is: 1,158.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,744.84 : 2,619.42 = 771.40 : x
  2. Step 2: Convert to fraction form
    1,744.84/2,619.42 = 771.40/x
  3. Step 3: Cross multiply
    1,744.84x = 2,619.42 × 771.40
  4. Step 4: Simplify right side
    1,744.84x = 2,020,620.59
  5. Step 5: Solve for x
    x = 2,020,620.59/1,744.84
  6. Step 6: Final answer
    x = 1,158.05

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1.5x scale

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.