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Finding the Fourth Proportional to 491,657.14, 678,500.04 and 276,805.36

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Solution

The fourth proportional to 491,657.14, 678,500.04 and 276,805.36 is: 381,998.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,657.14 : 678,500.04 = 276,805.36 : x
  2. Step 2: Convert to fraction form
    491,657.14/678,500.04 = 276,805.36/x
  3. Step 3: Cross multiply
    491,657.14x = 678,500.04 × 276,805.36
  4. Step 4: Simplify right side
    491,657.14x = 187,812,447,832.21
  5. Step 5: Solve for x
    x = 187,812,447,832.21/491,657.14
  6. Step 6: Final answer
    x = 381,998.82

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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.