Home / 3,480.71-5,219.69-1,287.93

Finding the Fourth Proportional to 3,480.71, 5,219.69 and 1,287.93

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Solution

The fourth proportional to 3,480.71, 5,219.69 and 1,287.93 is: 1,931.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,480.71 : 5,219.69 = 1,287.93 : x
  2. Step 2: Convert to fraction form
    3,480.71/5,219.69 = 1,287.93/x
  3. Step 3: Cross multiply
    3,480.71x = 5,219.69 × 1,287.93
  4. Step 4: Simplify right side
    3,480.71x = 6,722,588.90
  5. Step 5: Solve for x
    x = 6,722,588.90/3,480.71
  6. Step 6: Final answer
    x = 1,931.39

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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.