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Finding the Fourth Proportional to 491,442.61, 678,212.61 and 276,596.59

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Solution

The fourth proportional to 491,442.61, 678,212.61 and 276,596.59 is: 381,715.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,442.61 : 678,212.61 = 276,596.59 : x
  2. Step 2: Convert to fraction form
    491,442.61/678,212.61 = 276,596.59/x
  3. Step 3: Cross multiply
    491,442.61x = 678,212.61 × 276,596.59
  4. Step 4: Simplify right side
    491,442.61x = 187,591,295,221.00
  5. Step 5: Solve for x
    x = 187,591,295,221.00/491,442.61
  6. Step 6: Final answer
    x = 381,715.57

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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.