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Finding the Fourth Proportional to 4,987.40, 6,881.10 and 2,998.40

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Solution

The fourth proportional to 4,987.40, 6,881.10 and 2,998.40 is: 4,136.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,987.40 : 6,881.10 = 2,998.40 : x
  2. Step 2: Convert to fraction form
    4,987.40/6,881.10 = 2,998.40/x
  3. Step 3: Cross multiply
    4,987.40x = 6,881.10 × 2,998.40
  4. Step 4: Simplify right side
    4,987.40x = 20,632,290.24
  5. Step 5: Solve for x
    x = 20,632,290.24/4,987.40
  6. Step 6: Final answer
    x = 4,136.88

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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.