Home / 2,125.22-3,187.80-875.80

Finding the Fourth Proportional to 2,125.22, 3,187.80 and 875.80

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Solution

The fourth proportional to 2,125.22, 3,187.80 and 875.80 is: 1,313.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,125.22 : 3,187.80 = 875.80 : x
  2. Step 2: Convert to fraction form
    2,125.22/3,187.80 = 875.80/x
  3. Step 3: Cross multiply
    2,125.22x = 3,187.80 × 875.80
  4. Step 4: Simplify right side
    2,125.22x = 2,791,875.24
  5. Step 5: Solve for x
    x = 2,791,875.24/2,125.22
  6. Step 6: Final answer
    x = 1,313.69

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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.