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Finding the Fourth Proportional to 285,613.88, 394,147.15 and 158,297.67

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Solution

The fourth proportional to 285,613.88, 394,147.15 and 158,297.67 is: 218,450.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,613.88 : 394,147.15 = 158,297.67 : x
  2. Step 2: Convert to fraction form
    285,613.88/394,147.15 = 158,297.67/x
  3. Step 3: Cross multiply
    285,613.88x = 394,147.15 × 158,297.67
  4. Step 4: Simplify right side
    285,613.88x = 62,392,575,086.40
  5. Step 5: Solve for x
    x = 62,392,575,086.40/285,613.88
  6. Step 6: Final answer
    x = 218,450.78

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1.5x scale

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.