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Finding the Fourth Proportional to 491,438.60, 678,207.09 and 276,592.58

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Solution

The fourth proportional to 491,438.60, 678,207.09 and 276,592.58 is: 381,710.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,438.60 : 678,207.09 = 276,592.58 : x
  2. Step 2: Convert to fraction form
    491,438.60/678,207.09 = 276,592.58/x
  3. Step 3: Cross multiply
    491,438.60x = 678,207.09 × 276,592.58
  4. Step 4: Simplify right side
    491,438.60x = 187,587,045,406.36
  5. Step 5: Solve for x
    x = 187,587,045,406.36/491,438.60
  6. Step 6: Final answer
    x = 381,710.04

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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.