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Finding the Fourth Proportional to 377.92, 521.40 and 212.08

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Solution

The fourth proportional to 377.92, 521.40 and 212.08 is: 292.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    377.92 : 521.40 = 212.08 : x
  2. Step 2: Convert to fraction form
    377.92/521.40 = 212.08/x
  3. Step 3: Cross multiply
    377.92x = 521.40 × 212.08
  4. Step 4: Simplify right side
    377.92x = 110,578.51
  5. Step 5: Solve for x
    x = 110,578.51/377.92
  6. Step 6: Final answer
    x = 292.60

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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.