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Finding the Fourth Proportional to 242.48, 334.64 and 139.04

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Solution

The fourth proportional to 242.48, 334.64 and 139.04 is: 191.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.48 : 334.64 = 139.04 : x
  2. Step 2: Convert to fraction form
    242.48/334.64 = 139.04/x
  3. Step 3: Cross multiply
    242.48x = 334.64 × 139.04
  4. Step 4: Simplify right side
    242.48x = 46,528.35
  5. Step 5: Solve for x
    x = 46,528.35/242.48
  6. Step 6: Final answer
    x = 191.89

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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.