Home / 2,160.03-3,240.19-861.47

Finding the Fourth Proportional to 2,160.03, 3,240.19 and 861.47

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Solution

The fourth proportional to 2,160.03, 3,240.19 and 861.47 is: 1,292.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,160.03 : 3,240.19 = 861.47 : x
  2. Step 2: Convert to fraction form
    2,160.03/3,240.19 = 861.47/x
  3. Step 3: Cross multiply
    2,160.03x = 3,240.19 × 861.47
  4. Step 4: Simplify right side
    2,160.03x = 2,791,318.66
  5. Step 5: Solve for x
    x = 2,791,318.66/2,160.03
  6. Step 6: Final answer
    x = 1,292.26

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1.5x scale

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.