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Finding the Fourth Proportional to 491,611.38, 678,488.37 and 276,793.31

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Solution

The fourth proportional to 491,611.38, 678,488.37 and 276,793.31 is: 382,011.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,611.38 : 678,488.37 = 276,793.31 : x
  2. Step 2: Convert to fraction form
    491,611.38/678,488.37 = 276,793.31/x
  3. Step 3: Cross multiply
    491,611.38x = 678,488.37 × 276,793.31
  4. Step 4: Simplify right side
    491,611.38x = 187,801,041,728.81
  5. Step 5: Solve for x
    x = 187,801,041,728.81/491,611.38
  6. Step 6: Final answer
    x = 382,011.18

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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.