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Finding the Fourth Proportional to 939.83, 1,409.82 and 246.49

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Solution

The fourth proportional to 939.83, 1,409.82 and 246.49 is: 369.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    939.83 : 1,409.82 = 246.49 : x
  2. Step 2: Convert to fraction form
    939.83/1,409.82 = 246.49/x
  3. Step 3: Cross multiply
    939.83x = 1,409.82 × 246.49
  4. Step 4: Simplify right side
    939.83x = 347,506.53
  5. Step 5: Solve for x
    x = 347,506.53/939.83
  6. Step 6: Final answer
    x = 369.75

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Double scale
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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.