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Finding the Fourth Proportional to 355.64, 490.46 and 296.66

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Solution

The fourth proportional to 355.64, 490.46 and 296.66 is: 409.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.64 : 490.46 = 296.66 : x
  2. Step 2: Convert to fraction form
    355.64/490.46 = 296.66/x
  3. Step 3: Cross multiply
    355.64x = 490.46 × 296.66
  4. Step 4: Simplify right side
    355.64x = 145,499.86
  5. Step 5: Solve for x
    x = 145,499.86/355.64
  6. Step 6: Final answer
    x = 409.12

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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.