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Finding the Fourth Proportional to 374.36, 516.68 and 312.09

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Solution

The fourth proportional to 374.36, 516.68 and 312.09 is: 430.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.36 : 516.68 = 312.09 : x
  2. Step 2: Convert to fraction form
    374.36/516.68 = 312.09/x
  3. Step 3: Cross multiply
    374.36x = 516.68 × 312.09
  4. Step 4: Simplify right side
    374.36x = 161,247.30
  5. Step 5: Solve for x
    x = 161,247.30/374.36
  6. Step 6: Final answer
    x = 430.73

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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.