Home / 1,587.20-2,380.79-547.29

Finding the Fourth Proportional to 1,587.20, 2,380.79 and 547.29

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Solution

The fourth proportional to 1,587.20, 2,380.79 and 547.29 is: 820.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.20 : 2,380.79 = 547.29 : x
  2. Step 2: Convert to fraction form
    1,587.20/2,380.79 = 547.29/x
  3. Step 3: Cross multiply
    1,587.20x = 2,380.79 × 547.29
  4. Step 4: Simplify right side
    1,587.20x = 1,302,983.93
  5. Step 5: Solve for x
    x = 1,302,983.93/1,587.20
  6. Step 6: Final answer
    x = 820.94

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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.