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Finding the Fourth Proportional to 377.20, 521.40 and 346.96

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Solution

The fourth proportional to 377.20, 521.40 and 346.96 is: 479.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    377.20 : 521.40 = 346.96 : x
  2. Step 2: Convert to fraction form
    377.20/521.40 = 346.96/x
  3. Step 3: Cross multiply
    377.20x = 521.40 × 346.96
  4. Step 4: Simplify right side
    377.20x = 180,904.94
  5. Step 5: Solve for x
    x = 180,904.94/377.20
  6. Step 6: Final answer
    x = 479.60

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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.