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Finding the Fourth Proportional to 480.40, 720.70 and 236.96

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Solution

The fourth proportional to 480.40, 720.70 and 236.96 is: 355.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.40 : 720.70 = 236.96 : x
  2. Step 2: Convert to fraction form
    480.40/720.70 = 236.96/x
  3. Step 3: Cross multiply
    480.40x = 720.70 × 236.96
  4. Step 4: Simplify right side
    480.40x = 170,777.07
  5. Step 5: Solve for x
    x = 170,777.07/480.40
  6. Step 6: Final answer
    x = 355.49

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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.