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Finding the Fourth Proportional to 518.18, 715.17 and 352.30

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Solution

The fourth proportional to 518.18, 715.17 and 352.30 is: 486.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.18 : 715.17 = 352.30 : x
  2. Step 2: Convert to fraction form
    518.18/715.17 = 352.30/x
  3. Step 3: Cross multiply
    518.18x = 715.17 × 352.30
  4. Step 4: Simplify right side
    518.18x = 251,952.60
  5. Step 5: Solve for x
    x = 251,952.60/518.18
  6. Step 6: Final answer
    x = 486.23

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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.