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Finding the Fourth Proportional to 285,053.70, 393,311.63 and 170,315.11

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Solution

The fourth proportional to 285,053.70, 393,311.63 and 170,315.11 is: 234,997.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,053.70 : 393,311.63 = 170,315.11 : x
  2. Step 2: Convert to fraction form
    285,053.70/393,311.63 = 170,315.11/x
  3. Step 3: Cross multiply
    285,053.70x = 393,311.63 × 170,315.11
  4. Step 4: Simplify right side
    285,053.70x = 66,986,913,527.73
  5. Step 5: Solve for x
    x = 66,986,913,527.73/285,053.70
  6. Step 6: Final answer
    x = 234,997.52

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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.