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Finding the Fourth Proportional to 408,061.10, 612,091.65 and 405,728.30

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Solution

The fourth proportional to 408,061.10, 612,091.65 and 405,728.30 is: 608,592.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,061.10 : 612,091.65 = 405,728.30 : x
  2. Step 2: Convert to fraction form
    408,061.10/612,091.65 = 405,728.30/x
  3. Step 3: Cross multiply
    408,061.10x = 612,091.65 × 405,728.30
  4. Step 4: Simplify right side
    408,061.10x = 248,342,904,598.70
  5. Step 5: Solve for x
    x = 248,342,904,598.70/408,061.10
  6. Step 6: Final answer
    x = 608,592.45

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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.