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Finding the Fourth Proportional to 285,612.53, 394,129.28 and 156,526.41

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Solution

The fourth proportional to 285,612.53, 394,129.28 and 156,526.41 is: 215,997.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,612.53 : 394,129.28 = 156,526.41 : x
  2. Step 2: Convert to fraction form
    285,612.53/394,129.28 = 156,526.41/x
  3. Step 3: Cross multiply
    285,612.53x = 394,129.28 × 156,526.41
  4. Step 4: Simplify right side
    285,612.53x = 61,691,640,491.65
  5. Step 5: Solve for x
    x = 61,691,640,491.65/285,612.53
  6. Step 6: Final answer
    x = 215,997.67

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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.