Home / 2,174.47-3,000.30-1,290.56

Finding the Fourth Proportional to 2,174.47, 3,000.30 and 1,290.56

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Solution

The fourth proportional to 2,174.47, 3,000.30 and 1,290.56 is: 1,780.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,174.47 : 3,000.30 = 1,290.56 : x
  2. Step 2: Convert to fraction form
    2,174.47/3,000.30 = 1,290.56/x
  3. Step 3: Cross multiply
    2,174.47x = 3,000.30 × 1,290.56
  4. Step 4: Simplify right side
    2,174.47x = 3,872,052.17
  5. Step 5: Solve for x
    x = 3,872,052.17/2,174.47
  6. Step 6: Final answer
    x = 1,780.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.