Home / 1,587.52-2,191.92-1,028.80

Finding the Fourth Proportional to 1,587.52, 2,191.92 and 1,028.80

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Solution

The fourth proportional to 1,587.52, 2,191.92 and 1,028.80 is: 1,420.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.52 : 2,191.92 = 1,028.80 : x
  2. Step 2: Convert to fraction form
    1,587.52/2,191.92 = 1,028.80/x
  3. Step 3: Cross multiply
    1,587.52x = 2,191.92 × 1,028.80
  4. Step 4: Simplify right side
    1,587.52x = 2,255,047.30
  5. Step 5: Solve for x
    x = 2,255,047.30/1,587.52
  6. Step 6: Final answer
    x = 1,420.48

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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.