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Finding the Fourth Proportional to 518.96, 715.94 and 297.86

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Solution

The fourth proportional to 518.96, 715.94 and 297.86 is: 410.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.96 : 715.94 = 297.86 : x
  2. Step 2: Convert to fraction form
    518.96/715.94 = 297.86/x
  3. Step 3: Cross multiply
    518.96x = 715.94 × 297.86
  4. Step 4: Simplify right side
    518.96x = 213,249.89
  5. Step 5: Solve for x
    x = 213,249.89/518.96
  6. Step 6: Final answer
    x = 410.92

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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.