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Finding the Fourth Proportional to 487.23, 672.09 and 425.22

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Solution

The fourth proportional to 487.23, 672.09 and 425.22 is: 586.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.23 : 672.09 = 425.22 : x
  2. Step 2: Convert to fraction form
    487.23/672.09 = 425.22/x
  3. Step 3: Cross multiply
    487.23x = 672.09 × 425.22
  4. Step 4: Simplify right side
    487.23x = 285,786.11
  5. Step 5: Solve for x
    x = 285,786.11/487.23
  6. Step 6: Final answer
    x = 586.55

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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.