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Finding the Fourth Proportional to 543,485.70, 815,422.95 and 228,039.30

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Solution

The fourth proportional to 543,485.70, 815,422.95 and 228,039.30 is: 342,140.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,485.70 : 815,422.95 = 228,039.30 : x
  2. Step 2: Convert to fraction form
    543,485.70/815,422.95 = 228,039.30/x
  3. Step 3: Cross multiply
    543,485.70x = 815,422.95 × 228,039.30
  4. Step 4: Simplify right side
    543,485.70x = 185,948,478,721.94
  5. Step 5: Solve for x
    x = 185,948,478,721.94/543,485.70
  6. Step 6: Final answer
    x = 342,140.52

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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.