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Finding the Fourth Proportional to 377.54, 521.34 and 357.08

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Solution

The fourth proportional to 377.54, 521.34 and 357.08 is: 493.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    377.54 : 521.34 = 357.08 : x
  2. Step 2: Convert to fraction form
    377.54/521.34 = 357.08/x
  3. Step 3: Cross multiply
    377.54x = 521.34 × 357.08
  4. Step 4: Simplify right side
    377.54x = 186,160.09
  5. Step 5: Solve for x
    x = 186,160.09/377.54
  6. Step 6: Final answer
    x = 493.09

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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.