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Finding the Fourth Proportional to 285,790.15, 394,354.15 and 156,694.65

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Solution

The fourth proportional to 285,790.15, 394,354.15 and 156,694.65 is: 216,218.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,790.15 : 394,354.15 = 156,694.65 : x
  2. Step 2: Convert to fraction form
    285,790.15/394,354.15 = 156,694.65/x
  3. Step 3: Cross multiply
    285,790.15x = 394,354.15 × 156,694.65
  4. Step 4: Simplify right side
    285,790.15x = 61,793,185,510.30
  5. Step 5: Solve for x
    x = 61,793,185,510.30/285,790.15
  6. Step 6: Final answer
    x = 216,218.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.