Home / 1,327.60-1,987.70-675.12

Finding the Fourth Proportional to 1,327.60, 1,987.70 and 675.12

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Solution

The fourth proportional to 1,327.60, 1,987.70 and 675.12 is: 1,010.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,327.60 : 1,987.70 = 675.12 : x
  2. Step 2: Convert to fraction form
    1,327.60/1,987.70 = 675.12/x
  3. Step 3: Cross multiply
    1,327.60x = 1,987.70 × 675.12
  4. Step 4: Simplify right side
    1,327.60x = 1,341,936.02
  5. Step 5: Solve for x
    x = 1,341,936.02/1,327.60
  6. Step 6: Final answer
    x = 1,010.80

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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.