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Finding the Fourth Proportional to 278,860.70, 418,619.10 and 276,892.40

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Solution

The fourth proportional to 278,860.70, 418,619.10 and 276,892.40 is: 415,664.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,860.70 : 418,619.10 = 276,892.40 : x
  2. Step 2: Convert to fraction form
    278,860.70/418,619.10 = 276,892.40/x
  3. Step 3: Cross multiply
    278,860.70x = 418,619.10 × 276,892.40
  4. Step 4: Simplify right side
    278,860.70x = 115,912,447,284.84
  5. Step 5: Solve for x
    x = 115,912,447,284.84/278,860.70
  6. Step 6: Final answer
    x = 415,664.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.