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Finding the Fourth Proportional to 497.91, 687 and 301.39

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Solution

The fourth proportional to 497.91, 687 and 301.39 is: 415.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    497.91 : 687 = 301.39 : x
  2. Step 2: Convert to fraction form
    497.91/687 = 301.39/x
  3. Step 3: Cross multiply
    497.91x = 687 × 301.39
  4. Step 4: Simplify right side
    497.91x = 207,053.21
  5. Step 5: Solve for x
    x = 207,053.21/497.91
  6. Step 6: Final answer
    x = 415.84

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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.