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Finding the Fourth Proportional to 285,503.96, 393,990.36 and 158,177

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Solution

The fourth proportional to 285,503.96, 393,990.36 and 158,177 is: 218,281.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,503.96 : 393,990.36 = 158,177 : x
  2. Step 2: Convert to fraction form
    285,503.96/393,990.36 = 158,177/x
  3. Step 3: Cross multiply
    285,503.96x = 393,990.36 × 158,177
  4. Step 4: Simplify right side
    285,503.96x = 62,320,213,173.72
  5. Step 5: Solve for x
    x = 62,320,213,173.72/285,503.96
  6. Step 6: Final answer
    x = 218,281.43

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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.