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Finding the Fourth Proportional to 379.83, 526.33 and 356.71

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Solution

The fourth proportional to 379.83, 526.33 and 356.71 is: 494.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.83 : 526.33 = 356.71 : x
  2. Step 2: Convert to fraction form
    379.83/526.33 = 356.71/x
  3. Step 3: Cross multiply
    379.83x = 526.33 × 356.71
  4. Step 4: Simplify right side
    379.83x = 187,747.17
  5. Step 5: Solve for x
    x = 187,747.17/379.83
  6. Step 6: Final answer
    x = 494.29

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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.