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Finding the Fourth Proportional to 567.81, 851.45 and 220.91

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Solution

The fourth proportional to 567.81, 851.45 and 220.91 is: 331.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    567.81 : 851.45 = 220.91 : x
  2. Step 2: Convert to fraction form
    567.81/851.45 = 220.91/x
  3. Step 3: Cross multiply
    567.81x = 851.45 × 220.91
  4. Step 4: Simplify right side
    567.81x = 188,088.46
  5. Step 5: Solve for x
    x = 188,088.46/567.81
  6. Step 6: Final answer
    x = 331.25

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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.