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Finding the Fourth Proportional to 5,329,358.40, 7,994,815.20 and 2,489,563.20

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Solution

The fourth proportional to 5,329,358.40, 7,994,815.20 and 2,489,563.20 is: 3,734,708.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,329,358.40 : 7,994,815.20 = 2,489,563.20 : x
  2. Step 2: Convert to fraction form
    5,329,358.40/7,994,815.20 = 2,489,563.20/x
  3. Step 3: Cross multiply
    5,329,358.40x = 7,994,815.20 × 2,489,563.20
  4. Step 4: Simplify right side
    5,329,358.40x = 19,903,597,712,720.64
  5. Step 5: Solve for x
    x = 19,903,597,712,720.64/5,329,358.40
  6. Step 6: Final answer
    x = 3,734,708.05

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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.