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Finding the Fourth Proportional to 402,728.20, 603,401.10 and 262,414.60

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Solution

The fourth proportional to 402,728.20, 603,401.10 and 262,414.60 is: 393,171.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,728.20 : 603,401.10 = 262,414.60 : x
  2. Step 2: Convert to fraction form
    402,728.20/603,401.10 = 262,414.60/x
  3. Step 3: Cross multiply
    402,728.20x = 603,401.10 × 262,414.60
  4. Step 4: Simplify right side
    402,728.20x = 158,341,258,296.06
  5. Step 5: Solve for x
    x = 158,341,258,296.06/402,728.20
  6. Step 6: Final answer
    x = 393,171.52

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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.