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Finding the Fourth Proportional to 315.21, 435 and 175.35

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Solution

The fourth proportional to 315.21, 435 and 175.35 is: 241.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.21 : 435 = 175.35 : x
  2. Step 2: Convert to fraction form
    315.21/435 = 175.35/x
  3. Step 3: Cross multiply
    315.21x = 435 × 175.35
  4. Step 4: Simplify right side
    315.21x = 76,277.25
  5. Step 5: Solve for x
    x = 76,277.25/315.21
  6. Step 6: Final answer
    x = 241.99

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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.