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Finding the Fourth Proportional to 380.10, 524.55 and 247.38

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Solution

The fourth proportional to 380.10, 524.55 and 247.38 is: 341.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.10 : 524.55 = 247.38 : x
  2. Step 2: Convert to fraction form
    380.10/524.55 = 247.38/x
  3. Step 3: Cross multiply
    380.10x = 524.55 × 247.38
  4. Step 4: Simplify right side
    380.10x = 129,763.18
  5. Step 5: Solve for x
    x = 129,763.18/380.10
  6. Step 6: Final answer
    x = 341.39

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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.