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Finding the Fourth Proportional to 315.12, 433.80 and 252.48

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Solution

The fourth proportional to 315.12, 433.80 and 252.48 is: 347.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.12 : 433.80 = 252.48 : x
  2. Step 2: Convert to fraction form
    315.12/433.80 = 252.48/x
  3. Step 3: Cross multiply
    315.12x = 433.80 × 252.48
  4. Step 4: Simplify right side
    315.12x = 109,525.82
  5. Step 5: Solve for x
    x = 109,525.82/315.12
  6. Step 6: Final answer
    x = 347.57

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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.