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Finding the Fourth Proportional to 495.85, 743.11 and 386.30

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Solution

The fourth proportional to 495.85, 743.11 and 386.30 is: 578.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.85 : 743.11 = 386.30 : x
  2. Step 2: Convert to fraction form
    495.85/743.11 = 386.30/x
  3. Step 3: Cross multiply
    495.85x = 743.11 × 386.30
  4. Step 4: Simplify right side
    495.85x = 287,058.71
  5. Step 5: Solve for x
    x = 287,058.71/495.85
  6. Step 6: Final answer
    x = 578.93

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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.