Home / 3,187.83-4,780.53-1,239.78

Finding the Fourth Proportional to 3,187.83, 4,780.53 and 1,239.78

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Solution

The fourth proportional to 3,187.83, 4,780.53 and 1,239.78 is: 1,859.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,187.83 : 4,780.53 = 1,239.78 : x
  2. Step 2: Convert to fraction form
    3,187.83/4,780.53 = 1,239.78/x
  3. Step 3: Cross multiply
    3,187.83x = 4,780.53 × 1,239.78
  4. Step 4: Simplify right side
    3,187.83x = 5,926,805.48
  5. Step 5: Solve for x
    x = 5,926,805.48/3,187.83
  6. Step 6: Final answer
    x = 1,859.20

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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.