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Finding the Fourth Proportional to 491,753.88, 678,564.18 and 276,888.42

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Solution

The fourth proportional to 491,753.88, 678,564.18 and 276,888.42 is: 382,074.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,753.88 : 678,564.18 = 276,888.42 : x
  2. Step 2: Convert to fraction form
    491,753.88/678,564.18 = 276,888.42/x
  3. Step 3: Cross multiply
    491,753.88x = 678,564.18 × 276,888.42
  4. Step 4: Simplify right side
    491,753.88x = 187,886,563,668.80
  5. Step 5: Solve for x
    x = 187,886,563,668.80/491,753.88
  6. Step 6: Final answer
    x = 382,074.39

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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.