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Finding the Fourth Proportional to 355.47, 490.89 and 293.50

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Solution

The fourth proportional to 355.47, 490.89 and 293.50 is: 405.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.47 : 490.89 = 293.50 : x
  2. Step 2: Convert to fraction form
    355.47/490.89 = 293.50/x
  3. Step 3: Cross multiply
    355.47x = 490.89 × 293.50
  4. Step 4: Simplify right side
    355.47x = 144,076.22
  5. Step 5: Solve for x
    x = 144,076.22/355.47
  6. Step 6: Final answer
    x = 405.31

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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.