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Finding the Fourth Proportional to 625.06, 862.14 and 388.81

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Solution

The fourth proportional to 625.06, 862.14 and 388.81 is: 536.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.06 : 862.14 = 388.81 : x
  2. Step 2: Convert to fraction form
    625.06/862.14 = 388.81/x
  3. Step 3: Cross multiply
    625.06x = 862.14 × 388.81
  4. Step 4: Simplify right side
    625.06x = 335,208.65
  5. Step 5: Solve for x
    x = 335,208.65/625.06
  6. Step 6: Final answer
    x = 536.28

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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.