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Finding the Fourth Proportional to 543,612.20, 814,640.70 and 400,339.40

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Solution

The fourth proportional to 543,612.20, 814,640.70 and 400,339.40 is: 599,936.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,612.20 : 814,640.70 = 400,339.40 : x
  2. Step 2: Convert to fraction form
    543,612.20/814,640.70 = 400,339.40/x
  3. Step 3: Cross multiply
    543,612.20x = 814,640.70 × 400,339.40
  4. Step 4: Simplify right side
    543,612.20x = 326,132,769,053.58
  5. Step 5: Solve for x
    x = 326,132,769,053.58/543,612.20
  6. Step 6: Final answer
    x = 599,936.44

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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.