Home / 2,174.68-3,000.87-1,290.34

Finding the Fourth Proportional to 2,174.68, 3,000.87 and 1,290.34

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Solution

The fourth proportional to 2,174.68, 3,000.87 and 1,290.34 is: 1,780.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,174.68 : 3,000.87 = 1,290.34 : x
  2. Step 2: Convert to fraction form
    2,174.68/3,000.87 = 1,290.34/x
  3. Step 3: Cross multiply
    2,174.68x = 3,000.87 × 1,290.34
  4. Step 4: Simplify right side
    2,174.68x = 3,872,142.60
  5. Step 5: Solve for x
    x = 3,872,142.60/2,174.68
  6. Step 6: Final answer
    x = 1,780.56

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1.5x scale

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.