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Finding the Fourth Proportional to 488.88, 670.98 and 447.18

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Solution

The fourth proportional to 488.88, 670.98 and 447.18 is: 613.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.88 : 670.98 = 447.18 : x
  2. Step 2: Convert to fraction form
    488.88/670.98 = 447.18/x
  3. Step 3: Cross multiply
    488.88x = 670.98 × 447.18
  4. Step 4: Simplify right side
    488.88x = 300,048.84
  5. Step 5: Solve for x
    x = 300,048.84/488.88
  6. Step 6: Final answer
    x = 613.75

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.