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Finding the Fourth Proportional to 624.51, 936 and 259.20

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Solution

The fourth proportional to 624.51, 936 and 259.20 is: 388.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.51 : 936 = 259.20 : x
  2. Step 2: Convert to fraction form
    624.51/936 = 259.20/x
  3. Step 3: Cross multiply
    624.51x = 936 × 259.20
  4. Step 4: Simplify right side
    624.51x = 242,611.20
  5. Step 5: Solve for x
    x = 242,611.20/624.51
  6. Step 6: Final answer
    x = 388.48

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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.