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Finding the Fourth Proportional to 480.28, 720.47 and 155.57

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Solution

The fourth proportional to 480.28, 720.47 and 155.57 is: 233.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.28 : 720.47 = 155.57 : x
  2. Step 2: Convert to fraction form
    480.28/720.47 = 155.57/x
  3. Step 3: Cross multiply
    480.28x = 720.47 × 155.57
  4. Step 4: Simplify right side
    480.28x = 112,083.52
  5. Step 5: Solve for x
    x = 112,083.52/480.28
  6. Step 6: Final answer
    x = 233.37

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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.