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Finding the Fourth Proportional to 618,961.75, 928,442.63 and 408,550.48

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Solution

The fourth proportional to 618,961.75, 928,442.63 and 408,550.48 is: 612,825.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,961.75 : 928,442.63 = 408,550.48 : x
  2. Step 2: Convert to fraction form
    618,961.75/928,442.63 = 408,550.48/x
  3. Step 3: Cross multiply
    618,961.75x = 928,442.63 × 408,550.48
  4. Step 4: Simplify right side
    618,961.75x = 379,315,680,839.23
  5. Step 5: Solve for x
    x = 379,315,680,839.23/618,961.75
  6. Step 6: Final answer
    x = 612,825.72

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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.