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Finding the Fourth Proportional to 484.15, 672.61 and 479.65

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Solution

The fourth proportional to 484.15, 672.61 and 479.65 is: 666.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.15 : 672.61 = 479.65 : x
  2. Step 2: Convert to fraction form
    484.15/672.61 = 479.65/x
  3. Step 3: Cross multiply
    484.15x = 672.61 × 479.65
  4. Step 4: Simplify right side
    484.15x = 322,617.39
  5. Step 5: Solve for x
    x = 322,617.39/484.15
  6. Step 6: Final answer
    x = 666.36

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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.