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Finding the Fourth Proportional to 346.85, 520.18 and 130.31

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Solution

The fourth proportional to 346.85, 520.18 and 130.31 is: 195.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.85 : 520.18 = 130.31 : x
  2. Step 2: Convert to fraction form
    346.85/520.18 = 130.31/x
  3. Step 3: Cross multiply
    346.85x = 520.18 × 130.31
  4. Step 4: Simplify right side
    346.85x = 67,784.66
  5. Step 5: Solve for x
    x = 67,784.66/346.85
  6. Step 6: Final answer
    x = 195.43

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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.