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Finding the Fourth Proportional to 494.58, 681.12 and 493.10

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Solution

The fourth proportional to 494.58, 681.12 and 493.10 is: 679.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.58 : 681.12 = 493.10 : x
  2. Step 2: Convert to fraction form
    494.58/681.12 = 493.10/x
  3. Step 3: Cross multiply
    494.58x = 681.12 × 493.10
  4. Step 4: Simplify right side
    494.58x = 335,860.27
  5. Step 5: Solve for x
    x = 335,860.27/494.58
  6. Step 6: Final answer
    x = 679.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.