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Finding the Fourth Proportional to 605,086.20, 907,629.30 and 381,137.40

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Solution

The fourth proportional to 605,086.20, 907,629.30 and 381,137.40 is: 571,706.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,086.20 : 907,629.30 = 381,137.40 : x
  2. Step 2: Convert to fraction form
    605,086.20/907,629.30 = 381,137.40/x
  3. Step 3: Cross multiply
    605,086.20x = 907,629.30 × 381,137.40
  4. Step 4: Simplify right side
    605,086.20x = 345,931,471,565.82
  5. Step 5: Solve for x
    x = 345,931,471,565.82/605,086.20
  6. Step 6: Final answer
    x = 571,706.10

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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.