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Finding the Fourth Proportional to 480.70, 662.61 and 393.22

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Solution

The fourth proportional to 480.70, 662.61 and 393.22 is: 542.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.70 : 662.61 = 393.22 : x
  2. Step 2: Convert to fraction form
    480.70/662.61 = 393.22/x
  3. Step 3: Cross multiply
    480.70x = 662.61 × 393.22
  4. Step 4: Simplify right side
    480.70x = 260,551.50
  5. Step 5: Solve for x
    x = 260,551.50/480.70
  6. Step 6: Final answer
    x = 542.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.