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Finding the Fourth Proportional to 642,227.82, 963,640.62 and 287,481.84

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Solution

The fourth proportional to 642,227.82, 963,640.62 and 287,481.84 is: 431,356.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,227.82 : 963,640.62 = 287,481.84 : x
  2. Step 2: Convert to fraction form
    642,227.82/963,640.62 = 287,481.84/x
  3. Step 3: Cross multiply
    642,227.82x = 963,640.62 × 287,481.84
  4. Step 4: Simplify right side
    642,227.82x = 277,029,178,536.34
  5. Step 5: Solve for x
    x = 277,029,178,536.34/642,227.82
  6. Step 6: Final answer
    x = 431,356.55

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1.5x scale

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.