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Finding the Fourth Proportional to 356.14, 490.68 and 296.91

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Solution

The fourth proportional to 356.14, 490.68 and 296.91 is: 409.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.14 : 490.68 = 296.91 : x
  2. Step 2: Convert to fraction form
    356.14/490.68 = 296.91/x
  3. Step 3: Cross multiply
    356.14x = 490.68 × 296.91
  4. Step 4: Simplify right side
    356.14x = 145,687.80
  5. Step 5: Solve for x
    x = 145,687.80/356.14
  6. Step 6: Final answer
    x = 409.08

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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.