Home / 1,587.08-2,381.30-818.12

Finding the Fourth Proportional to 1,587.08, 2,381.30 and 818.12

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Solution

The fourth proportional to 1,587.08, 2,381.30 and 818.12 is: 1,227.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.08 : 2,381.30 = 818.12 : x
  2. Step 2: Convert to fraction form
    1,587.08/2,381.30 = 818.12/x
  3. Step 3: Cross multiply
    1,587.08x = 2,381.30 × 818.12
  4. Step 4: Simplify right side
    1,587.08x = 1,948,189.16
  5. Step 5: Solve for x
    x = 1,948,189.16/1,587.08
  6. Step 6: Final answer
    x = 1,227.53

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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.