Home / 1,587.24-2,191.19-998.37

Finding the Fourth Proportional to 1,587.24, 2,191.19 and 998.37

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Solution

The fourth proportional to 1,587.24, 2,191.19 and 998.37 is: 1,378.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.24 : 2,191.19 = 998.37 : x
  2. Step 2: Convert to fraction form
    1,587.24/2,191.19 = 998.37/x
  3. Step 3: Cross multiply
    1,587.24x = 2,191.19 × 998.37
  4. Step 4: Simplify right side
    1,587.24x = 2,187,613.37
  5. Step 5: Solve for x
    x = 2,187,613.37/1,587.24
  6. Step 6: Final answer
    x = 1,378.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.