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Finding the Fourth Proportional to 387.33, 577.26 and 386.73

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Solution

The fourth proportional to 387.33, 577.26 and 386.73 is: 576.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.33 : 577.26 = 386.73 : x
  2. Step 2: Convert to fraction form
    387.33/577.26 = 386.73/x
  3. Step 3: Cross multiply
    387.33x = 577.26 × 386.73
  4. Step 4: Simplify right side
    387.33x = 223,243.76
  5. Step 5: Solve for x
    x = 223,243.76/387.33
  6. Step 6: Final answer
    x = 576.37

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.