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Finding the Fourth Proportional to 425.51, 636.82 and 242.63

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Solution

The fourth proportional to 425.51, 636.82 and 242.63 is: 363.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.51 : 636.82 = 242.63 : x
  2. Step 2: Convert to fraction form
    425.51/636.82 = 242.63/x
  3. Step 3: Cross multiply
    425.51x = 636.82 × 242.63
  4. Step 4: Simplify right side
    425.51x = 154,507.85
  5. Step 5: Solve for x
    x = 154,507.85/425.51
  6. Step 6: Final answer
    x = 363.12

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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.