Home / 2,987.26-4,123.04-1,728.16

Finding the Fourth Proportional to 2,987.26, 4,123.04 and 1,728.16

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Solution

The fourth proportional to 2,987.26, 4,123.04 and 1,728.16 is: 2,385.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.26 : 4,123.04 = 1,728.16 : x
  2. Step 2: Convert to fraction form
    2,987.26/4,123.04 = 1,728.16/x
  3. Step 3: Cross multiply
    2,987.26x = 4,123.04 × 1,728.16
  4. Step 4: Simplify right side
    2,987.26x = 7,125,243.55
  5. Step 5: Solve for x
    x = 7,125,243.55/2,987.26
  6. Step 6: Final answer
    x = 2,385.21

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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.