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Finding the Fourth Proportional to 480.30, 720.47 and 155.67

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Solution

The fourth proportional to 480.30, 720.47 and 155.67 is: 233.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.30 : 720.47 = 155.67 : x
  2. Step 2: Convert to fraction form
    480.30/720.47 = 155.67/x
  3. Step 3: Cross multiply
    480.30x = 720.47 × 155.67
  4. Step 4: Simplify right side
    480.30x = 112,156.87
  5. Step 5: Solve for x
    x = 112,156.87/480.30
  6. Step 6: Final answer
    x = 233.51

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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.