Home / 3,019.20-4,530.70-1,287.80

Finding the Fourth Proportional to 3,019.20, 4,530.70 and 1,287.80

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Solution

The fourth proportional to 3,019.20, 4,530.70 and 1,287.80 is: 1,932.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,019.20 : 4,530.70 = 1,287.80 : x
  2. Step 2: Convert to fraction form
    3,019.20/4,530.70 = 1,287.80/x
  3. Step 3: Cross multiply
    3,019.20x = 4,530.70 × 1,287.80
  4. Step 4: Simplify right side
    3,019.20x = 5,834,635.46
  5. Step 5: Solve for x
    x = 5,834,635.46/3,019.20
  6. Step 6: Final answer
    x = 1,932.51

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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.