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Finding the Fourth Proportional to 822,803.20, 1,234,204.80 and 687,500.80

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Solution

The fourth proportional to 822,803.20, 1,234,204.80 and 687,500.80 is: 1,031,251.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    822,803.20 : 1,234,204.80 = 687,500.80 : x
  2. Step 2: Convert to fraction form
    822,803.20/1,234,204.80 = 687,500.80/x
  3. Step 3: Cross multiply
    822,803.20x = 1,234,204.80 × 687,500.80
  4. Step 4: Simplify right side
    822,803.20x = 848,516,787,363.84
  5. Step 5: Solve for x
    x = 848,516,787,363.84/822,803.20
  6. Step 6: Final answer
    x = 1,031,251.20

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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.