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Finding the Fourth Proportional to 911,465.84, 1,367,078.88 and 280,326.80

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Solution

The fourth proportional to 911,465.84, 1,367,078.88 and 280,326.80 is: 420,453.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,465.84 : 1,367,078.88 = 280,326.80 : x
  2. Step 2: Convert to fraction form
    911,465.84/1,367,078.88 = 280,326.80/x
  3. Step 3: Cross multiply
    911,465.84x = 1,367,078.88 × 280,326.80
  4. Step 4: Simplify right side
    911,465.84x = 383,228,847,777.98
  5. Step 5: Solve for x
    x = 383,228,847,777.98/911,465.84
  6. Step 6: Final answer
    x = 420,453.33

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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.