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Finding the Fourth Proportional to 488, 672.88 and 395.12

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Solution

The fourth proportional to 488, 672.88 and 395.12 is: 544.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    488 : 672.88 = 395.12 : x
  2. Step 2: Convert to fraction form
    488/672.88 = 395.12/x
  3. Step 3: Cross multiply
    488x = 672.88 × 395.12
  4. Step 4: Simplify right side
    488x = 265,868.35
  5. Step 5: Solve for x
    x = 265,868.35/488
  6. Step 6: Final answer
    x = 544.81

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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.