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Finding the Fourth Proportional to 543,404.70, 815,143.05 and 144,039.90

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Solution

The fourth proportional to 543,404.70, 815,143.05 and 144,039.90 is: 216,069.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,404.70 : 815,143.05 = 144,039.90 : x
  2. Step 2: Convert to fraction form
    543,404.70/815,143.05 = 144,039.90/x
  3. Step 3: Cross multiply
    543,404.70x = 815,143.05 × 144,039.90
  4. Step 4: Simplify right side
    543,404.70x = 117,413,123,407.70
  5. Step 5: Solve for x
    x = 117,413,123,407.70/543,404.70
  6. Step 6: Final answer
    x = 216,069.39

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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.