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Finding the Fourth Proportional to 624.68, 936.80 and 191.72

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Solution

The fourth proportional to 624.68, 936.80 and 191.72 is: 287.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.68 : 936.80 = 191.72 : x
  2. Step 2: Convert to fraction form
    624.68/936.80 = 191.72/x
  3. Step 3: Cross multiply
    624.68x = 936.80 × 191.72
  4. Step 4: Simplify right side
    624.68x = 179,603.30
  5. Step 5: Solve for x
    x = 179,603.30/624.68
  6. Step 6: Final answer
    x = 287.51

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1.5x scale

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.