Home / 3,187.30-4,781.25-1,239.65

Finding the Fourth Proportional to 3,187.30, 4,781.25 and 1,239.65

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Solution

The fourth proportional to 3,187.30, 4,781.25 and 1,239.65 is: 1,859.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,187.30 : 4,781.25 = 1,239.65 : x
  2. Step 2: Convert to fraction form
    3,187.30/4,781.25 = 1,239.65/x
  3. Step 3: Cross multiply
    3,187.30x = 4,781.25 × 1,239.65
  4. Step 4: Simplify right side
    3,187.30x = 5,927,070.36
  5. Step 5: Solve for x
    x = 5,927,070.36/3,187.30
  6. Step 6: Final answer
    x = 1,859.59

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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.