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Finding the Fourth Proportional to 624.15, 936.72 and 258.75

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Solution

The fourth proportional to 624.15, 936.72 and 258.75 is: 388.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.15 : 936.72 = 258.75 : x
  2. Step 2: Convert to fraction form
    624.15/936.72 = 258.75/x
  3. Step 3: Cross multiply
    624.15x = 936.72 × 258.75
  4. Step 4: Simplify right side
    624.15x = 242,376.30
  5. Step 5: Solve for x
    x = 242,376.30/624.15
  6. Step 6: Final answer
    x = 388.33

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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.