Home / 3,780.20-5,671.20-1,587.80

Finding the Fourth Proportional to 3,780.20, 5,671.20 and 1,587.80

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Solution

The fourth proportional to 3,780.20, 5,671.20 and 1,587.80 is: 2,382.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,780.20 : 5,671.20 = 1,587.80 : x
  2. Step 2: Convert to fraction form
    3,780.20/5,671.20 = 1,587.80/x
  3. Step 3: Cross multiply
    3,780.20x = 5,671.20 × 1,587.80
  4. Step 4: Simplify right side
    3,780.20x = 9,004,731.36
  5. Step 5: Solve for x
    x = 9,004,731.36/3,780.20
  6. Step 6: Final answer
    x = 2,382.08

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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.