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Finding the Fourth Proportional to 497.88, 687.03 and 308.77

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Solution

The fourth proportional to 497.88, 687.03 and 308.77 is: 426.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    497.88 : 687.03 = 308.77 : x
  2. Step 2: Convert to fraction form
    497.88/687.03 = 308.77/x
  3. Step 3: Cross multiply
    497.88x = 687.03 × 308.77
  4. Step 4: Simplify right side
    497.88x = 212,131.38
  5. Step 5: Solve for x
    x = 212,131.38/497.88
  6. Step 6: Final answer
    x = 426.07

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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.