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Finding the Fourth Proportional to 1,119.51, 1,544.95 and 622.17

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Solution

The fourth proportional to 1,119.51, 1,544.95 and 622.17 is: 858.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,119.51 : 1,544.95 = 622.17 : x
  2. Step 2: Convert to fraction form
    1,119.51/1,544.95 = 622.17/x
  3. Step 3: Cross multiply
    1,119.51x = 1,544.95 × 622.17
  4. Step 4: Simplify right side
    1,119.51x = 961,223.85
  5. Step 5: Solve for x
    x = 961,223.85/1,119.51
  6. Step 6: Final answer
    x = 858.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.