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Finding the Fourth Proportional to 403,620.60, 605,430.90 and 261,694.20

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Solution

The fourth proportional to 403,620.60, 605,430.90 and 261,694.20 is: 392,541.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,620.60 : 605,430.90 = 261,694.20 : x
  2. Step 2: Convert to fraction form
    403,620.60/605,430.90 = 261,694.20/x
  3. Step 3: Cross multiply
    403,620.60x = 605,430.90 × 261,694.20
  4. Step 4: Simplify right side
    403,620.60x = 158,437,755,030.78
  5. Step 5: Solve for x
    x = 158,437,755,030.78/403,620.60
  6. Step 6: Final answer
    x = 392,541.30

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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.