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Finding the Fourth Proportional to 341.21, 469.90 and 331.90

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Solution

The fourth proportional to 341.21, 469.90 and 331.90 is: 457.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    341.21 : 469.90 = 331.90 : x
  2. Step 2: Convert to fraction form
    341.21/469.90 = 331.90/x
  3. Step 3: Cross multiply
    341.21x = 469.90 × 331.90
  4. Step 4: Simplify right side
    341.21x = 155,959.05
  5. Step 5: Solve for x
    x = 155,959.05/341.21
  6. Step 6: Final answer
    x = 457.07

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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.