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Finding the Fourth Proportional to 403,962.20, 605,252.10 and 256,045.40

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Solution

The fourth proportional to 403,962.20, 605,252.10 and 256,045.40 is: 383,629.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,962.20 : 605,252.10 = 256,045.40 : x
  2. Step 2: Convert to fraction form
    403,962.20/605,252.10 = 256,045.40/x
  3. Step 3: Cross multiply
    403,962.20x = 605,252.10 × 256,045.40
  4. Step 4: Simplify right side
    403,962.20x = 154,972,016,045.34
  5. Step 5: Solve for x
    x = 154,972,016,045.34/403,962.20
  6. Step 6: Final answer
    x = 383,629.99

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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.