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Finding the Fourth Proportional to 374.31, 520.20 and 369.90

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Solution

The fourth proportional to 374.31, 520.20 and 369.90 is: 514.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.31 : 520.20 = 369.90 : x
  2. Step 2: Convert to fraction form
    374.31/520.20 = 369.90/x
  3. Step 3: Cross multiply
    374.31x = 520.20 × 369.90
  4. Step 4: Simplify right side
    374.31x = 192,421.98
  5. Step 5: Solve for x
    x = 192,421.98/374.31
  6. Step 6: Final answer
    x = 514.07

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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.