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Finding the Fourth Proportional to 3,984,305.40, 5,976,458.10 and 992,489.40

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Solution

The fourth proportional to 3,984,305.40, 5,976,458.10 and 992,489.40 is: 1,488,734.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,984,305.40 : 5,976,458.10 = 992,489.40 : x
  2. Step 2: Convert to fraction form
    3,984,305.40/5,976,458.10 = 992,489.40/x
  3. Step 3: Cross multiply
    3,984,305.40x = 5,976,458.10 × 992,489.40
  4. Step 4: Simplify right side
    3,984,305.40x = 5,931,571,313,794.14
  5. Step 5: Solve for x
    x = 5,931,571,313,794.14/3,984,305.40
  6. Step 6: Final answer
    x = 1,488,734.10

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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.