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Finding the Fourth Proportional to 543,658.20, 814,709.70 and 400,385.40

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Solution

The fourth proportional to 543,658.20, 814,709.70 and 400,385.40 is: 600,005.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,658.20 : 814,709.70 = 400,385.40 : x
  2. Step 2: Convert to fraction form
    543,658.20/814,709.70 = 400,385.40/x
  3. Step 3: Cross multiply
    543,658.20x = 814,709.70 × 400,385.40
  4. Step 4: Simplify right side
    543,658.20x = 326,197,869,118.38
  5. Step 5: Solve for x
    x = 326,197,869,118.38/543,658.20
  6. Step 6: Final answer
    x = 600,005.42

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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.