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Finding the Fourth Proportional to 1,226.45, 1,838.29 and 609.53

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Solution

The fourth proportional to 1,226.45, 1,838.29 and 609.53 is: 913.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,226.45 : 1,838.29 = 609.53 : x
  2. Step 2: Convert to fraction form
    1,226.45/1,838.29 = 609.53/x
  3. Step 3: Cross multiply
    1,226.45x = 1,838.29 × 609.53
  4. Step 4: Simplify right side
    1,226.45x = 1,120,492.90
  5. Step 5: Solve for x
    x = 1,120,492.90/1,226.45
  6. Step 6: Final answer
    x = 913.61

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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.