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Finding the Fourth Proportional to 242.70, 335.05 and 190.15

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Solution

The fourth proportional to 242.70, 335.05 and 190.15 is: 262.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.70 : 335.05 = 190.15 : x
  2. Step 2: Convert to fraction form
    242.70/335.05 = 190.15/x
  3. Step 3: Cross multiply
    242.70x = 335.05 × 190.15
  4. Step 4: Simplify right side
    242.70x = 63,708.81
  5. Step 5: Solve for x
    x = 63,708.81/242.70
  6. Step 6: Final answer
    x = 262.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.