Home / 5,385.70-8,078.73-1,489.78

Finding the Fourth Proportional to 5,385.70, 8,078.73 and 1,489.78

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Solution

The fourth proportional to 5,385.70, 8,078.73 and 1,489.78 is: 2,234.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,385.70 : 8,078.73 = 1,489.78 : x
  2. Step 2: Convert to fraction form
    5,385.70/8,078.73 = 1,489.78/x
  3. Step 3: Cross multiply
    5,385.70x = 8,078.73 × 1,489.78
  4. Step 4: Simplify right side
    5,385.70x = 12,035,530.38
  5. Step 5: Solve for x
    x = 12,035,530.38/5,385.70
  6. Step 6: Final answer
    x = 2,234.72

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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.