Home / 1,158.38-1,588.30-1,143.80

Finding the Fourth Proportional to 1,158.38, 1,588.30 and 1,143.80

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Solution

The fourth proportional to 1,158.38, 1,588.30 and 1,143.80 is: 1,568.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,158.38 : 1,588.30 = 1,143.80 : x
  2. Step 2: Convert to fraction form
    1,158.38/1,588.30 = 1,143.80/x
  3. Step 3: Cross multiply
    1,158.38x = 1,588.30 × 1,143.80
  4. Step 4: Simplify right side
    1,158.38x = 1,816,697.54
  5. Step 5: Solve for x
    x = 1,816,697.54/1,158.38
  6. Step 6: Final answer
    x = 1,568.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.