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Finding the Fourth Proportional to 492.66, 679.86 and 296.16

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Solution

The fourth proportional to 492.66, 679.86 and 296.16 is: 408.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.66 : 679.86 = 296.16 : x
  2. Step 2: Convert to fraction form
    492.66/679.86 = 296.16/x
  3. Step 3: Cross multiply
    492.66x = 679.86 × 296.16
  4. Step 4: Simplify right side
    492.66x = 201,347.34
  5. Step 5: Solve for x
    x = 201,347.34/492.66
  6. Step 6: Final answer
    x = 408.69

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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.