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Finding the Fourth Proportional to 480.31, 720.47 and 155.68

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Solution

The fourth proportional to 480.31, 720.47 and 155.68 is: 233.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.31 : 720.47 = 155.68 : x
  2. Step 2: Convert to fraction form
    480.31/720.47 = 155.68/x
  3. Step 3: Cross multiply
    480.31x = 720.47 × 155.68
  4. Step 4: Simplify right side
    480.31x = 112,161.36
  5. Step 5: Solve for x
    x = 112,161.36/480.31
  6. Step 6: Final answer
    x = 233.52

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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.