Home / 1,331.40-1,995.56-1,177.64

Finding the Fourth Proportional to 1,331.40, 1,995.56 and 1,177.64

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Solution

The fourth proportional to 1,331.40, 1,995.56 and 1,177.64 is: 1,765.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331.40 : 1,995.56 = 1,177.64 : x
  2. Step 2: Convert to fraction form
    1,331.40/1,995.56 = 1,177.64/x
  3. Step 3: Cross multiply
    1,331.40x = 1,995.56 × 1,177.64
  4. Step 4: Simplify right side
    1,331.40x = 2,350,051.28
  5. Step 5: Solve for x
    x = 2,350,051.28/1,331.40
  6. Step 6: Final answer
    x = 1,765.10

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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.