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Finding the Fourth Proportional to 625.45, 936.54 and 381.64

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Solution

The fourth proportional to 625.45, 936.54 and 381.64 is: 571.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.45 : 936.54 = 381.64 : x
  2. Step 2: Convert to fraction form
    625.45/936.54 = 381.64/x
  3. Step 3: Cross multiply
    625.45x = 936.54 × 381.64
  4. Step 4: Simplify right side
    625.45x = 357,421.13
  5. Step 5: Solve for x
    x = 357,421.13/625.45
  6. Step 6: Final answer
    x = 571.46

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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.