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Finding the Fourth Proportional to 381,608.66, 571,664.80 and 221,347.94

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Solution

The fourth proportional to 381,608.66, 571,664.80 and 221,347.94 is: 331,587.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,608.66 : 571,664.80 = 221,347.94 : x
  2. Step 2: Convert to fraction form
    381,608.66/571,664.80 = 221,347.94/x
  3. Step 3: Cross multiply
    381,608.66x = 571,664.80 × 221,347.94
  4. Step 4: Simplify right side
    381,608.66x = 126,536,822,438.82
  5. Step 5: Solve for x
    x = 126,536,822,438.82/381,608.66
  6. Step 6: Final answer
    x = 331,587.92

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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.