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Finding the Fourth Proportional to 403,398.80, 605,098.20 and 347,411.60

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Solution

The fourth proportional to 403,398.80, 605,098.20 and 347,411.60 is: 521,117.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,398.80 : 605,098.20 = 347,411.60 : x
  2. Step 2: Convert to fraction form
    403,398.80/605,098.20 = 347,411.60/x
  3. Step 3: Cross multiply
    403,398.80x = 605,098.20 × 347,411.60
  4. Step 4: Simplify right side
    403,398.80x = 210,218,133,819.12
  5. Step 5: Solve for x
    x = 210,218,133,819.12/403,398.80
  6. Step 6: Final answer
    x = 521,117.40

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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.