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Finding the Fourth Proportional to 4,987.20, 7,480.20 and 2,065.20

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Solution

The fourth proportional to 4,987.20, 7,480.20 and 2,065.20 is: 3,097.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,987.20 : 7,480.20 = 2,065.20 : x
  2. Step 2: Convert to fraction form
    4,987.20/7,480.20 = 2,065.20/x
  3. Step 3: Cross multiply
    4,987.20x = 7,480.20 × 2,065.20
  4. Step 4: Simplify right side
    4,987.20x = 15,448,109.04
  5. Step 5: Solve for x
    x = 15,448,109.04/4,987.20
  6. Step 6: Final answer
    x = 3,097.55

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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.