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Finding the Fourth Proportional to 488.20, 672.70 and 457.96

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Solution

The fourth proportional to 488.20, 672.70 and 457.96 is: 631.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.20 : 672.70 = 457.96 : x
  2. Step 2: Convert to fraction form
    488.20/672.70 = 457.96/x
  3. Step 3: Cross multiply
    488.20x = 672.70 × 457.96
  4. Step 4: Simplify right side
    488.20x = 308,069.69
  5. Step 5: Solve for x
    x = 308,069.69/488.20
  6. Step 6: Final answer
    x = 631.03

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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.