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Finding the Fourth Proportional to 624.56, 936.84 and 392.75

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Solution

The fourth proportional to 624.56, 936.84 and 392.75 is: 589.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.56 : 936.84 = 392.75 : x
  2. Step 2: Convert to fraction form
    624.56/936.84 = 392.75/x
  3. Step 3: Cross multiply
    624.56x = 936.84 × 392.75
  4. Step 4: Simplify right side
    624.56x = 367,939.23
  5. Step 5: Solve for x
    x = 367,939.23/624.56
  6. Step 6: Final answer
    x = 589.12

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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.