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Finding the Fourth Proportional to 240.31, 360.65 and 103.35

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Solution

The fourth proportional to 240.31, 360.65 and 103.35 is: 155.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.31 : 360.65 = 103.35 : x
  2. Step 2: Convert to fraction form
    240.31/360.65 = 103.35/x
  3. Step 3: Cross multiply
    240.31x = 360.65 × 103.35
  4. Step 4: Simplify right side
    240.31x = 37,274.79
  5. Step 5: Solve for x
    x = 37,274.79/240.31
  6. Step 6: Final answer
    x = 155.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.