Home / 3,187.14-4,780.05-1,239.30

Finding the Fourth Proportional to 3,187.14, 4,780.05 and 1,239.30

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Solution

The fourth proportional to 3,187.14, 4,780.05 and 1,239.30 is: 1,858.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,187.14 : 4,780.05 = 1,239.30 : x
  2. Step 2: Convert to fraction form
    3,187.14/4,780.05 = 1,239.30/x
  3. Step 3: Cross multiply
    3,187.14x = 4,780.05 × 1,239.30
  4. Step 4: Simplify right side
    3,187.14x = 5,923,915.97
  5. Step 5: Solve for x
    x = 5,923,915.97/3,187.14
  6. Step 6: Final answer
    x = 1,858.69

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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.