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Finding the Fourth Proportional to 278,992.08, 418,425.23 and 79,308.05

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Solution

The fourth proportional to 278,992.08, 418,425.23 and 79,308.05 is: 118,944.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,992.08 : 418,425.23 = 79,308.05 : x
  2. Step 2: Convert to fraction form
    278,992.08/418,425.23 = 79,308.05/x
  3. Step 3: Cross multiply
    278,992.08x = 418,425.23 × 79,308.05
  4. Step 4: Simplify right side
    278,992.08x = 33,184,487,168.25
  5. Step 5: Solve for x
    x = 33,184,487,168.25/278,992.08
  6. Step 6: Final answer
    x = 118,944.19

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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.