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Finding the Fourth Proportional to 2,490,419.20, 3,734,246.40 and 992,819.20

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Solution

The fourth proportional to 2,490,419.20, 3,734,246.40 and 992,819.20 is: 1,488,677.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,490,419.20 : 3,734,246.40 = 992,819.20 : x
  2. Step 2: Convert to fraction form
    2,490,419.20/3,734,246.40 = 992,819.20/x
  3. Step 3: Cross multiply
    2,490,419.20x = 3,734,246.40 × 992,819.20
  4. Step 4: Simplify right side
    2,490,419.20x = 3,707,431,523,450.88
  5. Step 5: Solve for x
    x = 3,707,431,523,450.88/2,490,419.20
  6. Step 6: Final answer
    x = 1,488,677.70

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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.