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Finding the Fourth Proportional to 495.41, 742.71 and 386.87

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Solution

The fourth proportional to 495.41, 742.71 and 386.87 is: 579.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.41 : 742.71 = 386.87 : x
  2. Step 2: Convert to fraction form
    495.41/742.71 = 386.87/x
  3. Step 3: Cross multiply
    495.41x = 742.71 × 386.87
  4. Step 4: Simplify right side
    495.41x = 287,332.22
  5. Step 5: Solve for x
    x = 287,332.22/495.41
  6. Step 6: Final answer
    x = 579.99

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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.