Home / 1,820.63-2,731.25-725.02

Finding the Fourth Proportional to 1,820.63, 2,731.25 and 725.02

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Solution

The fourth proportional to 1,820.63, 2,731.25 and 725.02 is: 1,087.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,820.63 : 2,731.25 = 725.02 : x
  2. Step 2: Convert to fraction form
    1,820.63/2,731.25 = 725.02/x
  3. Step 3: Cross multiply
    1,820.63x = 2,731.25 × 725.02
  4. Step 4: Simplify right side
    1,820.63x = 1,980,205.86
  5. Step 5: Solve for x
    x = 1,980,205.86/1,820.63
  6. Step 6: Final answer
    x = 1,087.65

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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.