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Finding the Fourth Proportional to 379.67, 526.54 and 355.91

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Solution

The fourth proportional to 379.67, 526.54 and 355.91 is: 493.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.67 : 526.54 = 355.91 : x
  2. Step 2: Convert to fraction form
    379.67/526.54 = 355.91/x
  3. Step 3: Cross multiply
    379.67x = 526.54 × 355.91
  4. Step 4: Simplify right side
    379.67x = 187,400.85
  5. Step 5: Solve for x
    x = 187,400.85/379.67
  6. Step 6: Final answer
    x = 493.59

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.