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Finding the Fourth Proportional to 677,129.62, 934,505.70 and 386,784.57

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Solution

The fourth proportional to 677,129.62, 934,505.70 and 386,784.57 is: 533,800.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,129.62 : 934,505.70 = 386,784.57 : x
  2. Step 2: Convert to fraction form
    677,129.62/934,505.70 = 386,784.57/x
  3. Step 3: Cross multiply
    677,129.62x = 934,505.70 × 386,784.57
  4. Step 4: Simplify right side
    677,129.62x = 361,452,385,337.05
  5. Step 5: Solve for x
    x = 361,452,385,337.05/677,129.62
  6. Step 6: Final answer
    x = 533,800.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.