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Finding the Fourth Proportional to 317.53, 438.23 and 243.82

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Solution

The fourth proportional to 317.53, 438.23 and 243.82 is: 336.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.53 : 438.23 = 243.82 : x
  2. Step 2: Convert to fraction form
    317.53/438.23 = 243.82/x
  3. Step 3: Cross multiply
    317.53x = 438.23 × 243.82
  4. Step 4: Simplify right side
    317.53x = 106,849.24
  5. Step 5: Solve for x
    x = 106,849.24/317.53
  6. Step 6: Final answer
    x = 336.50

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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.