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Finding the Fourth Proportional to 342.84, 514.48 and 126.40

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Solution

The fourth proportional to 342.84, 514.48 and 126.40 is: 189.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.84 : 514.48 = 126.40 : x
  2. Step 2: Convert to fraction form
    342.84/514.48 = 126.40/x
  3. Step 3: Cross multiply
    342.84x = 514.48 × 126.40
  4. Step 4: Simplify right side
    342.84x = 65,030.27
  5. Step 5: Solve for x
    x = 65,030.27/342.84
  6. Step 6: Final answer
    x = 189.68

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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.