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Finding the Fourth Proportional to 447.79, 672.13 and 317.93

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Solution

The fourth proportional to 447.79, 672.13 and 317.93 is: 477.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.79 : 672.13 = 317.93 : x
  2. Step 2: Convert to fraction form
    447.79/672.13 = 317.93/x
  3. Step 3: Cross multiply
    447.79x = 672.13 × 317.93
  4. Step 4: Simplify right side
    447.79x = 213,690.29
  5. Step 5: Solve for x
    x = 213,690.29/447.79
  6. Step 6: Final answer
    x = 477.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.