Home / 2,987.52-4,122.72-1,728.64

Finding the Fourth Proportional to 2,987.52, 4,122.72 and 1,728.64

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Solution

The fourth proportional to 2,987.52, 4,122.72 and 1,728.64 is: 2,385.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.52 : 4,122.72 = 1,728.64 : x
  2. Step 2: Convert to fraction form
    2,987.52/4,122.72 = 1,728.64/x
  3. Step 3: Cross multiply
    2,987.52x = 4,122.72 × 1,728.64
  4. Step 4: Simplify right side
    2,987.52x = 7,126,698.70
  5. Step 5: Solve for x
    x = 7,126,698.70/2,987.52
  6. Step 6: Final answer
    x = 2,385.49

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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.