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Finding the Fourth Proportional to 480.42, 720.47 and 206.46

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Solution

The fourth proportional to 480.42, 720.47 and 206.46 is: 309.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.42 : 720.47 = 206.46 : x
  2. Step 2: Convert to fraction form
    480.42/720.47 = 206.46/x
  3. Step 3: Cross multiply
    480.42x = 720.47 × 206.46
  4. Step 4: Simplify right side
    480.42x = 148,747.20
  5. Step 5: Solve for x
    x = 148,747.20/480.42
  6. Step 6: Final answer
    x = 309.62

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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.