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Finding the Fourth Proportional to 625.30, 935.55 and 409.30

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Solution

The fourth proportional to 625.30, 935.55 and 409.30 is: 612.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.30 : 935.55 = 409.30 : x
  2. Step 2: Convert to fraction form
    625.30/935.55 = 409.30/x
  3. Step 3: Cross multiply
    625.30x = 935.55 × 409.30
  4. Step 4: Simplify right side
    625.30x = 382,920.62
  5. Step 5: Solve for x
    x = 382,920.62/625.30
  6. Step 6: Final answer
    x = 612.38

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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.