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Finding the Fourth Proportional to 480,891.31, 663,636.99 and 276,978.85

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Solution

The fourth proportional to 480,891.31, 663,636.99 and 276,978.85 is: 382,234.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,891.31 : 663,636.99 = 276,978.85 : x
  2. Step 2: Convert to fraction form
    480,891.31/663,636.99 = 276,978.85/x
  3. Step 3: Cross multiply
    480,891.31x = 663,636.99 × 276,978.85
  4. Step 4: Simplify right side
    480,891.31x = 183,813,410,307.66
  5. Step 5: Solve for x
    x = 183,813,410,307.66/480,891.31
  6. Step 6: Final answer
    x = 382,234.83

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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.