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Finding the Fourth Proportional to 261,030.70, 391,546.05 and 228,889.90

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Solution

The fourth proportional to 261,030.70, 391,546.05 and 228,889.90 is: 343,334.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,030.70 : 391,546.05 = 228,889.90 : x
  2. Step 2: Convert to fraction form
    261,030.70/391,546.05 = 228,889.90/x
  3. Step 3: Cross multiply
    261,030.70x = 391,546.05 × 228,889.90
  4. Step 4: Simplify right side
    261,030.70x = 89,620,936,229.90
  5. Step 5: Solve for x
    x = 89,620,936,229.90/261,030.70
  6. Step 6: Final answer
    x = 343,334.85

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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.