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Finding the Fourth Proportional to 393.26, 586.94 and 386.77

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Solution

The fourth proportional to 393.26, 586.94 and 386.77 is: 577.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.26 : 586.94 = 386.77 : x
  2. Step 2: Convert to fraction form
    393.26/586.94 = 386.77/x
  3. Step 3: Cross multiply
    393.26x = 586.94 × 386.77
  4. Step 4: Simplify right side
    393.26x = 227,010.66
  5. Step 5: Solve for x
    x = 227,010.66/393.26
  6. Step 6: Final answer
    x = 577.26

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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.