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Finding the Fourth Proportional to 315.21, 435.20 and 241.91

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Solution

The fourth proportional to 315.21, 435.20 and 241.91 is: 333.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.21 : 435.20 = 241.91 : x
  2. Step 2: Convert to fraction form
    315.21/435.20 = 241.91/x
  3. Step 3: Cross multiply
    315.21x = 435.20 × 241.91
  4. Step 4: Simplify right side
    315.21x = 105,275.85
  5. Step 5: Solve for x
    x = 105,275.85/315.21
  6. Step 6: Final answer
    x = 333.99

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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.