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Finding the Fourth Proportional to 3,479,920.20, 5,219,880.30 and 3,479,920.20

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Solution

The fourth proportional to 3,479,920.20, 5,219,880.30 and 3,479,920.20 is: 5,219,880.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,479,920.20 : 5,219,880.30 = 3,479,920.20 : x
  2. Step 2: Convert to fraction form
    3,479,920.20/5,219,880.30 = 3,479,920.20/x
  3. Step 3: Cross multiply
    3,479,920.20x = 5,219,880.30 × 3,479,920.20
  4. Step 4: Simplify right side
    3,479,920.20x = 18,164,766,897,552.06
  5. Step 5: Solve for x
    x = 18,164,766,897,552.06/3,479,920.20
  6. Step 6: Final answer
    x = 5,219,880.30

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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.