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Finding the Fourth Proportional to 518.57, 715.46 and 352.50

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Solution

The fourth proportional to 518.57, 715.46 and 352.50 is: 486.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.57 : 715.46 = 352.50 : x
  2. Step 2: Convert to fraction form
    518.57/715.46 = 352.50/x
  3. Step 3: Cross multiply
    518.57x = 715.46 × 352.50
  4. Step 4: Simplify right side
    518.57x = 252,197.89
  5. Step 5: Solve for x
    x = 252,197.89/518.57
  6. Step 6: Final answer
    x = 486.33

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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.