Home / 1,555.90-2,331.80-1,143.10

Finding the Fourth Proportional to 1,555.90, 2,331.80 and 1,143.10

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Solution

The fourth proportional to 1,555.90, 2,331.80 and 1,143.10 is: 1,713.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.90 : 2,331.80 = 1,143.10 : x
  2. Step 2: Convert to fraction form
    1,555.90/2,331.80 = 1,143.10/x
  3. Step 3: Cross multiply
    1,555.90x = 2,331.80 × 1,143.10
  4. Step 4: Simplify right side
    1,555.90x = 2,665,480.58
  5. Step 5: Solve for x
    x = 2,665,480.58/1,555.90
  6. Step 6: Final answer
    x = 1,713.14

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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.