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Finding the Fourth Proportional to 285,569.37, 394,081.01 and 156,506.85

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Solution

The fourth proportional to 285,569.37, 394,081.01 and 156,506.85 is: 215,976.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,569.37 : 394,081.01 = 156,506.85 : x
  2. Step 2: Convert to fraction form
    285,569.37/394,081.01 = 156,506.85/x
  3. Step 3: Cross multiply
    285,569.37x = 394,081.01 × 156,506.85
  4. Step 4: Simplify right side
    285,569.37x = 61,676,376,737.38
  5. Step 5: Solve for x
    x = 61,676,376,737.38/285,569.37
  6. Step 6: Final answer
    x = 215,976.86

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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.