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Finding the Fourth Proportional to 618,961.50, 928,442.26 and 408,550.22

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Solution

The fourth proportional to 618,961.50, 928,442.26 and 408,550.22 is: 612,825.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,961.50 : 928,442.26 = 408,550.22 : x
  2. Step 2: Convert to fraction form
    618,961.50/928,442.26 = 408,550.22/x
  3. Step 3: Cross multiply
    618,961.50x = 928,442.26 × 408,550.22
  4. Step 4: Simplify right side
    618,961.50x = 379,315,289,580.30
  5. Step 5: Solve for x
    x = 379,315,289,580.30/618,961.50
  6. Step 6: Final answer
    x = 612,825.34

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Double scale
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Similar ratio
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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.