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Finding the Fourth Proportional to 641.81, 962.76 and 480.53

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Solution

The fourth proportional to 641.81, 962.76 and 480.53 is: 720.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.81 : 962.76 = 480.53 : x
  2. Step 2: Convert to fraction form
    641.81/962.76 = 480.53/x
  3. Step 3: Cross multiply
    641.81x = 962.76 × 480.53
  4. Step 4: Simplify right side
    641.81x = 462,635.06
  5. Step 5: Solve for x
    x = 462,635.06/641.81
  6. Step 6: Final answer
    x = 720.83

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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.