Home / 4,289.60-6,434.40-2,640.80

Finding the Fourth Proportional to 4,289.60, 6,434.40 and 2,640.80

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Solution

The fourth proportional to 4,289.60, 6,434.40 and 2,640.80 is: 3,961.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,289.60 : 6,434.40 = 2,640.80 : x
  2. Step 2: Convert to fraction form
    4,289.60/6,434.40 = 2,640.80/x
  3. Step 3: Cross multiply
    4,289.60x = 6,434.40 × 2,640.80
  4. Step 4: Simplify right side
    4,289.60x = 16,991,963.52
  5. Step 5: Solve for x
    x = 16,991,963.52/4,289.60
  6. Step 6: Final answer
    x = 3,961.20

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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.