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Finding the Fourth Proportional to 381.45, 526.38 and 224.10

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Solution

The fourth proportional to 381.45, 526.38 and 224.10 is: 309.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.45 : 526.38 = 224.10 : x
  2. Step 2: Convert to fraction form
    381.45/526.38 = 224.10/x
  3. Step 3: Cross multiply
    381.45x = 526.38 × 224.10
  4. Step 4: Simplify right side
    381.45x = 117,961.76
  5. Step 5: Solve for x
    x = 117,961.76/381.45
  6. Step 6: Final answer
    x = 309.25

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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.