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Finding the Fourth Proportional to 543,677.22, 815,349.38 and 259,217.78

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Solution

The fourth proportional to 543,677.22, 815,349.38 and 259,217.78 is: 388,747.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,677.22 : 815,349.38 = 259,217.78 : x
  2. Step 2: Convert to fraction form
    543,677.22/815,349.38 = 259,217.78/x
  3. Step 3: Cross multiply
    543,677.22x = 815,349.38 × 259,217.78
  4. Step 4: Simplify right side
    543,677.22x = 211,353,050,835.14
  5. Step 5: Solve for x
    x = 211,353,050,835.14/543,677.22
  6. Step 6: Final answer
    x = 388,747.30

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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.