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Finding the Fourth Proportional to 290,027.10, 435,040.65 and 90,363.62

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Solution

The fourth proportional to 290,027.10, 435,040.65 and 90,363.62 is: 135,545.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,027.10 : 435,040.65 = 90,363.62 : x
  2. Step 2: Convert to fraction form
    290,027.10/435,040.65 = 90,363.62/x
  3. Step 3: Cross multiply
    290,027.10x = 435,040.65 × 90,363.62
  4. Step 4: Simplify right side
    290,027.10x = 39,311,847,981.15
  5. Step 5: Solve for x
    x = 39,311,847,981.15/290,027.10
  6. Step 6: Final answer
    x = 135,545.43

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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.