Home / 1,542.60-2,313.90-991.80

Finding the Fourth Proportional to 1,542.60, 2,313.90 and 991.80

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Solution

The fourth proportional to 1,542.60, 2,313.90 and 991.80 is: 1,487.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,542.60 : 2,313.90 = 991.80 : x
  2. Step 2: Convert to fraction form
    1,542.60/2,313.90 = 991.80/x
  3. Step 3: Cross multiply
    1,542.60x = 2,313.90 × 991.80
  4. Step 4: Simplify right side
    1,542.60x = 2,294,926.02
  5. Step 5: Solve for x
    x = 2,294,926.02/1,542.60
  6. Step 6: Final answer
    x = 1,487.70

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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.