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Finding the Fourth Proportional to 543,385.80, 815,081.52 and 318,588.59

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Solution

The fourth proportional to 543,385.80, 815,081.52 and 318,588.59 is: 477,884.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,385.80 : 815,081.52 = 318,588.59 : x
  2. Step 2: Convert to fraction form
    543,385.80/815,081.52 = 318,588.59/x
  3. Step 3: Cross multiply
    543,385.80x = 815,081.52 × 318,588.59
  4. Step 4: Simplify right side
    543,385.80x = 259,675,667,802.25
  5. Step 5: Solve for x
    x = 259,675,667,802.25/543,385.80
  6. Step 6: Final answer
    x = 477,884.53

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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.