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Finding the Fourth Proportional to 5,404.80, 8,128.80 and 4,843.20

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Solution

The fourth proportional to 5,404.80, 8,128.80 and 4,843.20 is: 7,284.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,404.80 : 8,128.80 = 4,843.20 : x
  2. Step 2: Convert to fraction form
    5,404.80/8,128.80 = 4,843.20/x
  3. Step 3: Cross multiply
    5,404.80x = 8,128.80 × 4,843.20
  4. Step 4: Simplify right side
    5,404.80x = 39,369,404.16
  5. Step 5: Solve for x
    x = 39,369,404.16/5,404.80
  6. Step 6: Final answer
    x = 7,284.16

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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.