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Finding the Fourth Proportional to 346.86, 520.18 and 115.68

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Solution

The fourth proportional to 346.86, 520.18 and 115.68 is: 173.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.86 : 520.18 = 115.68 : x
  2. Step 2: Convert to fraction form
    346.86/520.18 = 115.68/x
  3. Step 3: Cross multiply
    346.86x = 520.18 × 115.68
  4. Step 4: Simplify right side
    346.86x = 60,176.41
  5. Step 5: Solve for x
    x = 60,176.41/346.86
  6. Step 6: Final answer
    x = 173.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.