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Finding the Fourth Proportional to 285,429.20, 393,904.80 and 158,104.80

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Solution

The fourth proportional to 285,429.20, 393,904.80 and 158,104.80 is: 218,191.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,429.20 : 393,904.80 = 158,104.80 : x
  2. Step 2: Convert to fraction form
    285,429.20/393,904.80 = 158,104.80/x
  3. Step 3: Cross multiply
    285,429.20x = 393,904.80 × 158,104.80
  4. Step 4: Simplify right side
    285,429.20x = 62,278,239,623.04
  5. Step 5: Solve for x
    x = 62,278,239,623.04/285,429.20
  6. Step 6: Final answer
    x = 218,191.55

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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.