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Finding the Fourth Proportional to 491,726.88, 678,526.92 and 276,861.42

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Solution

The fourth proportional to 491,726.88, 678,526.92 and 276,861.42 is: 382,037.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,726.88 : 678,526.92 = 276,861.42 : x
  2. Step 2: Convert to fraction form
    491,726.88/678,526.92 = 276,861.42/x
  3. Step 3: Cross multiply
    491,726.88x = 678,526.92 × 276,861.42
  4. Step 4: Simplify right side
    491,726.88x = 187,857,926,579.43
  5. Step 5: Solve for x
    x = 187,857,926,579.43/491,726.88
  6. Step 6: Final answer
    x = 382,037.13

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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.