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Finding the Fourth Proportional to 280,616.63, 421,029.51 and 168,377.40

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Solution

The fourth proportional to 280,616.63, 421,029.51 and 168,377.40 is: 252,628.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,616.63 : 421,029.51 = 168,377.40 : x
  2. Step 2: Convert to fraction form
    280,616.63/421,029.51 = 168,377.40/x
  3. Step 3: Cross multiply
    280,616.63x = 421,029.51 × 168,377.40
  4. Step 4: Simplify right side
    280,616.63x = 70,891,854,217.07
  5. Step 5: Solve for x
    x = 70,891,854,217.07/280,616.63
  6. Step 6: Final answer
    x = 252,628.84

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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.