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Finding the Fourth Proportional to 386.93, 577.59 and 358.38

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Solution

The fourth proportional to 386.93, 577.59 and 358.38 is: 534.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.93 : 577.59 = 358.38 : x
  2. Step 2: Convert to fraction form
    386.93/577.59 = 358.38/x
  3. Step 3: Cross multiply
    386.93x = 577.59 × 358.38
  4. Step 4: Simplify right side
    386.93x = 206,996.70
  5. Step 5: Solve for x
    x = 206,996.70/386.93
  6. Step 6: Final answer
    x = 534.97

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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.