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Finding the Fourth Proportional to 624.12, 936.12 and 191.25

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Solution

The fourth proportional to 624.12, 936.12 and 191.25 is: 286.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.12 : 936.12 = 191.25 : x
  2. Step 2: Convert to fraction form
    624.12/936.12 = 191.25/x
  3. Step 3: Cross multiply
    624.12x = 936.12 × 191.25
  4. Step 4: Simplify right side
    624.12x = 179,032.95
  5. Step 5: Solve for x
    x = 179,032.95/624.12
  6. Step 6: Final answer
    x = 286.86

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Half scale
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Double scale
Find fourth proportional to 625.12, 937.62 and 192.25
Similar ratio
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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.