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Finding the Fourth Proportional to 427,806, 642,339.76 and 238,635.92

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Solution

The fourth proportional to 427,806, 642,339.76 and 238,635.92 is: 358,305.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,806 : 642,339.76 = 238,635.92 : x
  2. Step 2: Convert to fraction form
    427,806/642,339.76 = 238,635.92/x
  3. Step 3: Cross multiply
    427,806x = 642,339.76 × 238,635.92
  4. Step 4: Simplify right side
    427,806x = 153,285,339,580.18
  5. Step 5: Solve for x
    x = 153,285,339,580.18/427,806
  6. Step 6: Final answer
    x = 358,305.73

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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.