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Finding the Fourth Proportional to 344.72, 475.80 and 318.08

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Solution

The fourth proportional to 344.72, 475.80 and 318.08 is: 439.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    344.72 : 475.80 = 318.08 : x
  2. Step 2: Convert to fraction form
    344.72/475.80 = 318.08/x
  3. Step 3: Cross multiply
    344.72x = 475.80 × 318.08
  4. Step 4: Simplify right side
    344.72x = 151,342.46
  5. Step 5: Solve for x
    x = 151,342.46/344.72
  6. Step 6: Final answer
    x = 439.03

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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.