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Finding the Fourth Proportional to 278,950.63, 418,422.30 and 68,590.39

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Solution

The fourth proportional to 278,950.63, 418,422.30 and 68,590.39 is: 102,884.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,950.63 : 418,422.30 = 68,590.39 : x
  2. Step 2: Convert to fraction form
    278,950.63/418,422.30 = 68,590.39/x
  3. Step 3: Cross multiply
    278,950.63x = 418,422.30 × 68,590.39
  4. Step 4: Simplify right side
    278,950.63x = 28,699,748,741.70
  5. Step 5: Solve for x
    x = 28,699,748,741.70/278,950.63
  6. Step 6: Final answer
    x = 102,884.69

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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.