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Finding the Fourth Proportional to 459.92, 687.77 and 343

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Solution

The fourth proportional to 459.92, 687.77 and 343 is: 512.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.92 : 687.77 = 343 : x
  2. Step 2: Convert to fraction form
    459.92/687.77 = 343/x
  3. Step 3: Cross multiply
    459.92x = 687.77 × 343
  4. Step 4: Simplify right side
    459.92x = 235,905.11
  5. Step 5: Solve for x
    x = 235,905.11/459.92
  6. Step 6: Final answer
    x = 512.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.