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Finding the Fourth Proportional to 377.06, 519.36 and 311.72

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Solution

The fourth proportional to 377.06, 519.36 and 311.72 is: 429.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    377.06 : 519.36 = 311.72 : x
  2. Step 2: Convert to fraction form
    377.06/519.36 = 311.72/x
  3. Step 3: Cross multiply
    377.06x = 519.36 × 311.72
  4. Step 4: Simplify right side
    377.06x = 161,894.90
  5. Step 5: Solve for x
    x = 161,894.90/377.06
  6. Step 6: Final answer
    x = 429.36

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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.