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Finding the Fourth Proportional to 4,308.40, 6,472.20 and 4,145.20

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Solution

The fourth proportional to 4,308.40, 6,472.20 and 4,145.20 is: 6,227.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,308.40 : 6,472.20 = 4,145.20 : x
  2. Step 2: Convert to fraction form
    4,308.40/6,472.20 = 4,145.20/x
  3. Step 3: Cross multiply
    4,308.40x = 6,472.20 × 4,145.20
  4. Step 4: Simplify right side
    4,308.40x = 26,828,563.44
  5. Step 5: Solve for x
    x = 26,828,563.44/4,308.40
  6. Step 6: Final answer
    x = 6,227.04

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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.