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Finding the Fourth Proportional to 543,486.70, 815,424.45 and 228,040.30

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Solution

The fourth proportional to 543,486.70, 815,424.45 and 228,040.30 is: 342,142.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,486.70 : 815,424.45 = 228,040.30 : x
  2. Step 2: Convert to fraction form
    543,486.70/815,424.45 = 228,040.30/x
  3. Step 3: Cross multiply
    543,486.70x = 815,424.45 × 228,040.30
  4. Step 4: Simplify right side
    543,486.70x = 185,949,636,205.34
  5. Step 5: Solve for x
    x = 185,949,636,205.34/543,486.70
  6. Step 6: Final answer
    x = 342,142.02

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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.