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Finding the Fourth Proportional to 518.88, 715.89 and 297.84

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Solution

The fourth proportional to 518.88, 715.89 and 297.84 is: 410.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.88 : 715.89 = 297.84 : x
  2. Step 2: Convert to fraction form
    518.88/715.89 = 297.84/x
  3. Step 3: Cross multiply
    518.88x = 715.89 × 297.84
  4. Step 4: Simplify right side
    518.88x = 213,220.68
  5. Step 5: Solve for x
    x = 213,220.68/518.88
  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.