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Finding the Fourth Proportional to 4,987.28, 6,881.28 and 2,997.92

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Solution

The fourth proportional to 4,987.28, 6,881.28 and 2,997.92 is: 4,136.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,987.28 : 6,881.28 = 2,997.92 : x
  2. Step 2: Convert to fraction form
    4,987.28/6,881.28 = 2,997.92/x
  3. Step 3: Cross multiply
    4,987.28x = 6,881.28 × 2,997.92
  4. Step 4: Simplify right side
    4,987.28x = 20,629,526.94
  5. Step 5: Solve for x
    x = 20,629,526.94/4,987.28
  6. Step 6: Final answer
    x = 4,136.43

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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.