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Finding the Fourth Proportional to 1,119.75, 1,545.26 and 622.41

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Solution

The fourth proportional to 1,119.75, 1,545.26 and 622.41 is: 858.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,119.75 : 1,545.26 = 622.41 : x
  2. Step 2: Convert to fraction form
    1,119.75/1,545.26 = 622.41/x
  3. Step 3: Cross multiply
    1,119.75x = 1,545.26 × 622.41
  4. Step 4: Simplify right side
    1,119.75x = 961,782.16
  5. Step 5: Solve for x
    x = 961,782.16/1,119.75
  6. Step 6: Final answer
    x = 858.93

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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.