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Finding the Fourth Proportional to 403,957.20, 605,244.60 and 256,040.40

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Solution

The fourth proportional to 403,957.20, 605,244.60 and 256,040.40 is: 383,622.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,957.20 : 605,244.60 = 256,040.40 : x
  2. Step 2: Convert to fraction form
    403,957.20/605,244.60 = 256,040.40/x
  3. Step 3: Cross multiply
    403,957.20x = 605,244.60 × 256,040.40
  4. Step 4: Simplify right side
    403,957.20x = 154,967,069,481.84
  5. Step 5: Solve for x
    x = 154,967,069,481.84/403,957.20
  6. Step 6: Final answer
    x = 383,622.50

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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.