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Finding the Fourth Proportional to 564.81, 847.62 and 321.81

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Solution

The fourth proportional to 564.81, 847.62 and 321.81 is: 482.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    564.81 : 847.62 = 321.81 : x
  2. Step 2: Convert to fraction form
    564.81/847.62 = 321.81/x
  3. Step 3: Cross multiply
    564.81x = 847.62 × 321.81
  4. Step 4: Simplify right side
    564.81x = 272,772.59
  5. Step 5: Solve for x
    x = 272,772.59/564.81
  6. Step 6: Final answer
    x = 482.95

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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.