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Finding the Fourth Proportional to 447.96, 672.96 and 386.47

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Solution

The fourth proportional to 447.96, 672.96 and 386.47 is: 580.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.96 : 672.96 = 386.47 : x
  2. Step 2: Convert to fraction form
    447.96/672.96 = 386.47/x
  3. Step 3: Cross multiply
    447.96x = 672.96 × 386.47
  4. Step 4: Simplify right side
    447.96x = 260,075.49
  5. Step 5: Solve for x
    x = 260,075.49/447.96
  6. Step 6: Final answer
    x = 580.58

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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.