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Finding the Fourth Proportional to 458,080.80, 687,121.20 and 192,141.60

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Solution

The fourth proportional to 458,080.80, 687,121.20 and 192,141.60 is: 288,212.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,080.80 : 687,121.20 = 192,141.60 : x
  2. Step 2: Convert to fraction form
    458,080.80/687,121.20 = 192,141.60/x
  3. Step 3: Cross multiply
    458,080.80x = 687,121.20 × 192,141.60
  4. Step 4: Simplify right side
    458,080.80x = 132,024,566,761.92
  5. Step 5: Solve for x
    x = 132,024,566,761.92/458,080.80
  6. Step 6: Final answer
    x = 288,212.40

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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.