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Finding the Fourth Proportional to 518.38, 715.38 and 297.36

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Solution

The fourth proportional to 518.38, 715.38 and 297.36 is: 410.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.38 : 715.38 = 297.36 : x
  2. Step 2: Convert to fraction form
    518.38/715.38 = 297.36/x
  3. Step 3: Cross multiply
    518.38x = 715.38 × 297.36
  4. Step 4: Simplify right side
    518.38x = 212,725.40
  5. Step 5: Solve for x
    x = 212,725.40/518.38
  6. Step 6: Final answer
    x = 410.37

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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.