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Finding the Fourth Proportional to 285,231.96, 393,496.50 and 171,991.80

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Solution

The fourth proportional to 285,231.96, 393,496.50 and 171,991.80 is: 237,274.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,231.96 : 393,496.50 = 171,991.80 : x
  2. Step 2: Convert to fraction form
    285,231.96/393,496.50 = 171,991.80/x
  3. Step 3: Cross multiply
    285,231.96x = 393,496.50 × 171,991.80
  4. Step 4: Simplify right side
    285,231.96x = 67,678,171,328.70
  5. Step 5: Solve for x
    x = 67,678,171,328.70/285,231.96
  6. Step 6: Final answer
    x = 237,274.15

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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.