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Finding the Fourth Proportional to 543,641.20, 815,656.20 and 228,194.80

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Solution

The fourth proportional to 543,641.20, 815,656.20 and 228,194.80 is: 342,373.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,641.20 : 815,656.20 = 228,194.80 : x
  2. Step 2: Convert to fraction form
    543,641.20/815,656.20 = 228,194.80/x
  3. Step 3: Cross multiply
    543,641.20x = 815,656.20 × 228,194.80
  4. Step 4: Simplify right side
    543,641.20x = 186,128,503,427.76
  5. Step 5: Solve for x
    x = 186,128,503,427.76/543,641.20
  6. Step 6: Final answer
    x = 342,373.80

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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.