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Finding the Fourth Proportional to 381.65, 526.40 and 248.63

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Solution

The fourth proportional to 381.65, 526.40 and 248.63 is: 342.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.65 : 526.40 = 248.63 : x
  2. Step 2: Convert to fraction form
    381.65/526.40 = 248.63/x
  3. Step 3: Cross multiply
    381.65x = 526.40 × 248.63
  4. Step 4: Simplify right side
    381.65x = 130,876.82
  5. Step 5: Solve for x
    x = 130,876.82/381.65
  6. Step 6: Final answer
    x = 342.92

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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.