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Finding the Fourth Proportional to 1,284,148.80, 1,922,536.80 and 1,247,284.80

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Solution

The fourth proportional to 1,284,148.80, 1,922,536.80 and 1,247,284.80 is: 1,867,346.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,284,148.80 : 1,922,536.80 = 1,247,284.80 : x
  2. Step 2: Convert to fraction form
    1,284,148.80/1,922,536.80 = 1,247,284.80/x
  3. Step 3: Cross multiply
    1,284,148.80x = 1,922,536.80 × 1,247,284.80
  4. Step 4: Simplify right side
    1,284,148.80x = 2,397,950,928,080.64
  5. Step 5: Solve for x
    x = 2,397,950,928,080.64/1,284,148.80
  6. Step 6: Final answer
    x = 1,867,346.63

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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.