Home / 2,127.38-3,189.80-877.60

Finding the Fourth Proportional to 2,127.38, 3,189.80 and 877.60

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Solution

The fourth proportional to 2,127.38, 3,189.80 and 877.60 is: 1,315.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,127.38 : 3,189.80 = 877.60 : x
  2. Step 2: Convert to fraction form
    2,127.38/3,189.80 = 877.60/x
  3. Step 3: Cross multiply
    2,127.38x = 3,189.80 × 877.60
  4. Step 4: Simplify right side
    2,127.38x = 2,799,368.48
  5. Step 5: Solve for x
    x = 2,799,368.48/2,127.38
  6. Step 6: Final answer
    x = 1,315.88

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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.