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Finding the Fourth Proportional to 380.85, 525.59 and 240.91

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Solution

The fourth proportional to 380.85, 525.59 and 240.91 is: 332.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.85 : 525.59 = 240.91 : x
  2. Step 2: Convert to fraction form
    380.85/525.59 = 240.91/x
  3. Step 3: Cross multiply
    380.85x = 525.59 × 240.91
  4. Step 4: Simplify right side
    380.85x = 126,621.25
  5. Step 5: Solve for x
    x = 126,621.25/380.85
  6. Step 6: Final answer
    x = 332.47

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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.