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Finding the Fourth Proportional to 625.07, 863.13 and 438.93

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Solution

The fourth proportional to 625.07, 863.13 and 438.93 is: 606.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.07 : 863.13 = 438.93 : x
  2. Step 2: Convert to fraction form
    625.07/863.13 = 438.93/x
  3. Step 3: Cross multiply
    625.07x = 863.13 × 438.93
  4. Step 4: Simplify right side
    625.07x = 378,853.65
  5. Step 5: Solve for x
    x = 378,853.65/625.07
  6. Step 6: Final answer
    x = 606.10

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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.