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Finding the Fourth Proportional to 547,394.20, 820,400.10 and 485,186.20

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Solution

The fourth proportional to 547,394.20, 820,400.10 and 485,186.20 is: 727,166.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,394.20 : 820,400.10 = 485,186.20 : x
  2. Step 2: Convert to fraction form
    547,394.20/820,400.10 = 485,186.20/x
  3. Step 3: Cross multiply
    547,394.20x = 820,400.10 × 485,186.20
  4. Step 4: Simplify right side
    547,394.20x = 398,046,806,998.62
  5. Step 5: Solve for x
    x = 398,046,806,998.62/547,394.20
  6. Step 6: Final answer
    x = 727,166.65

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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.