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Finding the Fourth Proportional to 5,387.88, 8,080.90 and 1,491.38

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Solution

The fourth proportional to 5,387.88, 8,080.90 and 1,491.38 is: 2,236.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,387.88 : 8,080.90 = 1,491.38 : x
  2. Step 2: Convert to fraction form
    5,387.88/8,080.90 = 1,491.38/x
  3. Step 3: Cross multiply
    5,387.88x = 8,080.90 × 1,491.38
  4. Step 4: Simplify right side
    5,387.88x = 12,051,692.64
  5. Step 5: Solve for x
    x = 12,051,692.64/5,387.88
  6. Step 6: Final answer
    x = 2,236.82

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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.