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Finding the Fourth Proportional to 567.69, 851.75 and 386.79

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Solution

The fourth proportional to 567.69, 851.75 and 386.79 is: 580.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    567.69 : 851.75 = 386.79 : x
  2. Step 2: Convert to fraction form
    567.69/851.75 = 386.79/x
  3. Step 3: Cross multiply
    567.69x = 851.75 × 386.79
  4. Step 4: Simplify right side
    567.69x = 329,448.38
  5. Step 5: Solve for x
    x = 329,448.38/567.69
  6. Step 6: Final answer
    x = 580.33

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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.