Home / 1,331.22-1,995.60-1,127.10

Finding the Fourth Proportional to 1,331.22, 1,995.60 and 1,127.10

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Solution

The fourth proportional to 1,331.22, 1,995.60 and 1,127.10 is: 1,689.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331.22 : 1,995.60 = 1,127.10 : x
  2. Step 2: Convert to fraction form
    1,331.22/1,995.60 = 1,127.10/x
  3. Step 3: Cross multiply
    1,331.22x = 1,995.60 × 1,127.10
  4. Step 4: Simplify right side
    1,331.22x = 2,249,240.76
  5. Step 5: Solve for x
    x = 2,249,240.76/1,331.22
  6. Step 6: Final answer
    x = 1,689.61

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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.