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Finding the Fourth Proportional to 492.74, 679.95 and 296.25

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Solution

The fourth proportional to 492.74, 679.95 and 296.25 is: 408.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.74 : 679.95 = 296.25 : x
  2. Step 2: Convert to fraction form
    492.74/679.95 = 296.25/x
  3. Step 3: Cross multiply
    492.74x = 679.95 × 296.25
  4. Step 4: Simplify right side
    492.74x = 201,435.19
  5. Step 5: Solve for x
    x = 201,435.19/492.74
  6. Step 6: Final answer
    x = 408.81

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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.