Home / 1,874.12-2,811.36-487.45

Finding the Fourth Proportional to 1,874.12, 2,811.36 and 487.45

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Solution

The fourth proportional to 1,874.12, 2,811.36 and 487.45 is: 731.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,874.12 : 2,811.36 = 487.45 : x
  2. Step 2: Convert to fraction form
    1,874.12/2,811.36 = 487.45/x
  3. Step 3: Cross multiply
    1,874.12x = 2,811.36 × 487.45
  4. Step 4: Simplify right side
    1,874.12x = 1,370,400.03
  5. Step 5: Solve for x
    x = 1,370,400.03/1,874.12
  6. Step 6: Final answer
    x = 731.22

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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.