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Finding the Fourth Proportional to 2,561.04, 3,839.81 and 917.55

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Solution

The fourth proportional to 2,561.04, 3,839.81 and 917.55 is: 1,375.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,561.04 : 3,839.81 = 917.55 : x
  2. Step 2: Convert to fraction form
    2,561.04/3,839.81 = 917.55/x
  3. Step 3: Cross multiply
    2,561.04x = 3,839.81 × 917.55
  4. Step 4: Simplify right side
    2,561.04x = 3,523,213.08
  5. Step 5: Solve for x
    x = 3,523,213.08/2,561.04
  6. Step 6: Final answer
    x = 1,375.70

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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.