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Finding the Fourth Proportional to 346.09, 518.95 and 140.55

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Solution

The fourth proportional to 346.09, 518.95 and 140.55 is: 210.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.09 : 518.95 = 140.55 : x
  2. Step 2: Convert to fraction form
    346.09/518.95 = 140.55/x
  3. Step 3: Cross multiply
    346.09x = 518.95 × 140.55
  4. Step 4: Simplify right side
    346.09x = 72,938.42
  5. Step 5: Solve for x
    x = 72,938.42/346.09
  6. Step 6: Final answer
    x = 210.75

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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.