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Finding the Fourth Proportional to 518.70, 715.63 and 352.63

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Solution

The fourth proportional to 518.70, 715.63 and 352.63 is: 486.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.70 : 715.63 = 352.63 : x
  2. Step 2: Convert to fraction form
    518.70/715.63 = 352.63/x
  3. Step 3: Cross multiply
    518.70x = 715.63 × 352.63
  4. Step 4: Simplify right side
    518.70x = 252,347.27
  5. Step 5: Solve for x
    x = 252,347.27/518.70
  6. Step 6: Final answer
    x = 486.50

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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.