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Finding the Fourth Proportional to 285,423.99, 393,894 and 158,111.43

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Solution

The fourth proportional to 285,423.99, 393,894 and 158,111.43 is: 218,198.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,423.99 : 393,894 = 158,111.43 : x
  2. Step 2: Convert to fraction form
    285,423.99/393,894 = 158,111.43/x
  3. Step 3: Cross multiply
    285,423.99x = 393,894 × 158,111.43
  4. Step 4: Simplify right side
    285,423.99x = 62,279,143,608.42
  5. Step 5: Solve for x
    x = 62,279,143,608.42/285,423.99
  6. Step 6: Final answer
    x = 218,198.70

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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.