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Finding the Fourth Proportional to 346.06, 518.56 and 140.40

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Solution

The fourth proportional to 346.06, 518.56 and 140.40 is: 210.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.06 : 518.56 = 140.40 : x
  2. Step 2: Convert to fraction form
    346.06/518.56 = 140.40/x
  3. Step 3: Cross multiply
    346.06x = 518.56 × 140.40
  4. Step 4: Simplify right side
    346.06x = 72,805.82
  5. Step 5: Solve for x
    x = 72,805.82/346.06
  6. Step 6: Final answer
    x = 210.38

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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.