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Finding the Fourth Proportional to 4,425.20, 6,640.20 and 1,828.40

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Solution

The fourth proportional to 4,425.20, 6,640.20 and 1,828.40 is: 2,743.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,425.20 : 6,640.20 = 1,828.40 : x
  2. Step 2: Convert to fraction form
    4,425.20/6,640.20 = 1,828.40/x
  3. Step 3: Cross multiply
    4,425.20x = 6,640.20 × 1,828.40
  4. Step 4: Simplify right side
    4,425.20x = 12,140,941.68
  5. Step 5: Solve for x
    x = 12,140,941.68/4,425.20
  6. Step 6: Final answer
    x = 2,743.59

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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.