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Finding the Fourth Proportional to 1,223.15, 1,834.04 and 401.20

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Solution

The fourth proportional to 1,223.15, 1,834.04 and 401.20 is: 601.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,223.15 : 1,834.04 = 401.20 : x
  2. Step 2: Convert to fraction form
    1,223.15/1,834.04 = 401.20/x
  3. Step 3: Cross multiply
    1,223.15x = 1,834.04 × 401.20
  4. Step 4: Simplify right side
    1,223.15x = 735,814.84
  5. Step 5: Solve for x
    x = 735,814.84/1,223.15
  6. Step 6: Final answer
    x = 601.58

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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.