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Finding the Fourth Proportional to 419.94, 625.91 and 410.22

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Solution

The fourth proportional to 419.94, 625.91 and 410.22 is: 611.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.94 : 625.91 = 410.22 : x
  2. Step 2: Convert to fraction form
    419.94/625.91 = 410.22/x
  3. Step 3: Cross multiply
    419.94x = 625.91 × 410.22
  4. Step 4: Simplify right side
    419.94x = 256,760.80
  5. Step 5: Solve for x
    x = 256,760.80/419.94
  6. Step 6: Final answer
    x = 611.42

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.