Home / 1,327.66-1,988.40-1,281.53

Finding the Fourth Proportional to 1,327.66, 1,988.40 and 1,281.53

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Solution

The fourth proportional to 1,327.66, 1,988.40 and 1,281.53 is: 1,919.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,327.66 : 1,988.40 = 1,281.53 : x
  2. Step 2: Convert to fraction form
    1,327.66/1,988.40 = 1,281.53/x
  3. Step 3: Cross multiply
    1,327.66x = 1,988.40 × 1,281.53
  4. Step 4: Simplify right side
    1,327.66x = 2,548,204.03
  5. Step 5: Solve for x
    x = 2,548,204.03/1,327.66
  6. Step 6: Final answer
    x = 1,919.32

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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.