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Finding the Fourth Proportional to 494.20, 681.88 and 297.64

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Solution

The fourth proportional to 494.20, 681.88 and 297.64 is: 410.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.20 : 681.88 = 297.64 : x
  2. Step 2: Convert to fraction form
    494.20/681.88 = 297.64/x
  3. Step 3: Cross multiply
    494.20x = 681.88 × 297.64
  4. Step 4: Simplify right side
    494.20x = 202,954.76
  5. Step 5: Solve for x
    x = 202,954.76/494.20
  6. Step 6: Final answer
    x = 410.67

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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.