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Finding the Fourth Proportional to 543,434.70, 815,540.85 and 228,117.90

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Solution

The fourth proportional to 543,434.70, 815,540.85 and 228,117.90 is: 342,340.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,434.70 : 815,540.85 = 228,117.90 : x
  2. Step 2: Convert to fraction form
    543,434.70/815,540.85 = 228,117.90/x
  3. Step 3: Cross multiply
    543,434.70x = 815,540.85 × 228,117.90
  4. Step 4: Simplify right side
    543,434.70x = 186,039,466,066.22
  5. Step 5: Solve for x
    x = 186,039,466,066.22/543,434.70
  6. Step 6: Final answer
    x = 342,340.06

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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.