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Finding the Fourth Proportional to 543,959.15, 815,913.81 and 189,000.95

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Solution

The fourth proportional to 543,959.15, 815,913.81 and 189,000.95 is: 283,492.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,959.15 : 815,913.81 = 189,000.95 : x
  2. Step 2: Convert to fraction form
    543,959.15/815,913.81 = 189,000.95/x
  3. Step 3: Cross multiply
    543,959.15x = 815,913.81 × 189,000.95
  4. Step 4: Simplify right side
    543,959.15x = 154,208,481,128.55
  5. Step 5: Solve for x
    x = 154,208,481,128.55/543,959.15
  6. Step 6: Final answer
    x = 283,492.76

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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.