Home / 2,174.85-2,999.97-1,290.47

Finding the Fourth Proportional to 2,174.85, 2,999.97 and 1,290.47

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Solution

The fourth proportional to 2,174.85, 2,999.97 and 1,290.47 is: 1,780.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,174.85 : 2,999.97 = 1,290.47 : x
  2. Step 2: Convert to fraction form
    2,174.85/2,999.97 = 1,290.47/x
  3. Step 3: Cross multiply
    2,174.85x = 2,999.97 × 1,290.47
  4. Step 4: Simplify right side
    2,174.85x = 3,871,356.29
  5. Step 5: Solve for x
    x = 3,871,356.29/2,174.85
  6. Step 6: Final answer
    x = 1,780.06

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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.