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Finding the Fourth Proportional to 911,695.80, 1,367,561.31 and 280,609

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Solution

The fourth proportional to 911,695.80, 1,367,561.31 and 280,609 is: 420,918.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,695.80 : 1,367,561.31 = 280,609 : x
  2. Step 2: Convert to fraction form
    911,695.80/1,367,561.31 = 280,609/x
  3. Step 3: Cross multiply
    911,695.80x = 1,367,561.31 × 280,609
  4. Step 4: Simplify right side
    911,695.80x = 383,750,011,637.79
  5. Step 5: Solve for x
    x = 383,750,011,637.79/911,695.80
  6. Step 6: Final answer
    x = 420,918.92

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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.