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Finding the Fourth Proportional to 495.81, 687.17 and 486.59

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Solution

The fourth proportional to 495.81, 687.17 and 486.59 is: 674.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.81 : 687.17 = 486.59 : x
  2. Step 2: Convert to fraction form
    495.81/687.17 = 486.59/x
  3. Step 3: Cross multiply
    495.81x = 687.17 × 486.59
  4. Step 4: Simplify right side
    495.81x = 334,367.83
  5. Step 5: Solve for x
    x = 334,367.83/495.81
  6. Step 6: Final answer
    x = 674.39

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.