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Finding the Fourth Proportional to 4,909.86, 7,363.20 and 1,622.20

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Solution

The fourth proportional to 4,909.86, 7,363.20 and 1,622.20 is: 2,432.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,909.86 : 7,363.20 = 1,622.20 : x
  2. Step 2: Convert to fraction form
    4,909.86/7,363.20 = 1,622.20/x
  3. Step 3: Cross multiply
    4,909.86x = 7,363.20 × 1,622.20
  4. Step 4: Simplify right side
    4,909.86x = 11,944,583.04
  5. Step 5: Solve for x
    x = 11,944,583.04/4,909.86
  6. Step 6: Final answer
    x = 2,432.77

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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.