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Finding the Fourth Proportional to 285,699.39, 394,238.64 and 158,364.15

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Solution

The fourth proportional to 285,699.39, 394,238.64 and 158,364.15 is: 218,527.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,699.39 : 394,238.64 = 158,364.15 : x
  2. Step 2: Convert to fraction form
    285,699.39/394,238.64 = 158,364.15/x
  3. Step 3: Cross multiply
    285,699.39x = 394,238.64 × 158,364.15
  4. Step 4: Simplify right side
    285,699.39x = 62,433,267,120.76
  5. Step 5: Solve for x
    x = 62,433,267,120.76/285,699.39
  6. Step 6: Final answer
    x = 218,527.83

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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.