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Finding the Fourth Proportional to 497.92, 687.21 and 379.70

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Solution

The fourth proportional to 497.92, 687.21 and 379.70 is: 524.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    497.92 : 687.21 = 379.70 : x
  2. Step 2: Convert to fraction form
    497.92/687.21 = 379.70/x
  3. Step 3: Cross multiply
    497.92x = 687.21 × 379.70
  4. Step 4: Simplify right side
    497.92x = 260,933.64
  5. Step 5: Solve for x
    x = 260,933.64/497.92
  6. Step 6: Final answer
    x = 524.05

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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.