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Finding the Fourth Proportional to 624.74, 936.74 and 259.80

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Solution

The fourth proportional to 624.74, 936.74 and 259.80 is: 389.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.74 : 936.74 = 259.80 : x
  2. Step 2: Convert to fraction form
    624.74/936.74 = 259.80/x
  3. Step 3: Cross multiply
    624.74x = 936.74 × 259.80
  4. Step 4: Simplify right side
    624.74x = 243,365.05
  5. Step 5: Solve for x
    x = 243,365.05/624.74
  6. Step 6: Final answer
    x = 389.55

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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.