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Finding the Fourth Proportional to 347,718.21, 479,818.85 and 196,815.21

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Solution

The fourth proportional to 347,718.21, 479,818.85 and 196,815.21 is: 271,586.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,718.21 : 479,818.85 = 196,815.21 : x
  2. Step 2: Convert to fraction form
    347,718.21/479,818.85 = 196,815.21/x
  3. Step 3: Cross multiply
    347,718.21x = 479,818.85 × 196,815.21
  4. Step 4: Simplify right side
    347,718.21x = 94,435,647,724.71
  5. Step 5: Solve for x
    x = 94,435,647,724.71/347,718.21
  6. Step 6: Final answer
    x = 271,586.72

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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.