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Finding the Fourth Proportional to 342.98, 514.55 and 137.58

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Solution

The fourth proportional to 342.98, 514.55 and 137.58 is: 206.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.98 : 514.55 = 137.58 : x
  2. Step 2: Convert to fraction form
    342.98/514.55 = 137.58/x
  3. Step 3: Cross multiply
    342.98x = 514.55 × 137.58
  4. Step 4: Simplify right side
    342.98x = 70,791.79
  5. Step 5: Solve for x
    x = 70,791.79/342.98
  6. Step 6: Final answer
    x = 206.40

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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.