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Finding the Fourth Proportional to 285,139.56, 393,425.72 and 194,683.90

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Solution

The fourth proportional to 285,139.56, 393,425.72 and 194,683.90 is: 268,618.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,139.56 : 393,425.72 = 194,683.90 : x
  2. Step 2: Convert to fraction form
    285,139.56/393,425.72 = 194,683.90/x
  3. Step 3: Cross multiply
    285,139.56x = 393,425.72 × 194,683.90
  4. Step 4: Simplify right side
    285,139.56x = 76,593,653,529.91
  5. Step 5: Solve for x
    x = 76,593,653,529.91/285,139.56
  6. Step 6: Final answer
    x = 268,618.12

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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.