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Finding the Fourth Proportional to 318.02, 438.88 and 240.26

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Solution

The fourth proportional to 318.02, 438.88 and 240.26 is: 331.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.02 : 438.88 = 240.26 : x
  2. Step 2: Convert to fraction form
    318.02/438.88 = 240.26/x
  3. Step 3: Cross multiply
    318.02x = 438.88 × 240.26
  4. Step 4: Simplify right side
    318.02x = 105,445.31
  5. Step 5: Solve for x
    x = 105,445.31/318.02
  6. Step 6: Final answer
    x = 331.57

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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.