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Finding the Fourth Proportional to 285,763.02, 394,351.11 and 158,438.58

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Solution

The fourth proportional to 285,763.02, 394,351.11 and 158,438.58 is: 218,644.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,763.02 : 394,351.11 = 158,438.58 : x
  2. Step 2: Convert to fraction form
    285,763.02/394,351.11 = 158,438.58/x
  3. Step 3: Cross multiply
    285,763.02x = 394,351.11 × 158,438.58
  4. Step 4: Simplify right side
    285,763.02x = 62,480,429,889.82
  5. Step 5: Solve for x
    x = 62,480,429,889.82/285,763.02
  6. Step 6: Final answer
    x = 218,644.21

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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.