Home / 2,175.47-3,261.24-858.90

Finding the Fourth Proportional to 2,175.47, 3,261.24 and 858.90

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Solution

The fourth proportional to 2,175.47, 3,261.24 and 858.90 is: 1,287.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,175.47 : 3,261.24 = 858.90 : x
  2. Step 2: Convert to fraction form
    2,175.47/3,261.24 = 858.90/x
  3. Step 3: Cross multiply
    2,175.47x = 3,261.24 × 858.90
  4. Step 4: Simplify right side
    2,175.47x = 2,801,079.04
  5. Step 5: Solve for x
    x = 2,801,079.04/2,175.47
  6. Step 6: Final answer
    x = 1,287.58

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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.