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Finding the Fourth Proportional to 318,833.82, 478,249.92 and 218,690.28

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Solution

The fourth proportional to 318,833.82, 478,249.92 and 218,690.28 is: 328,034.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,833.82 : 478,249.92 = 218,690.28 : x
  2. Step 2: Convert to fraction form
    318,833.82/478,249.92 = 218,690.28/x
  3. Step 3: Cross multiply
    318,833.82x = 478,249.92 × 218,690.28
  4. Step 4: Simplify right side
    318,833.82x = 104,588,608,914.78
  5. Step 5: Solve for x
    x = 104,588,608,914.78/318,833.82
  6. Step 6: Final answer
    x = 328,034.86

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1.5x scale

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.