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Finding the Fourth Proportional to 425.15, 636.86 and 242.01

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Solution

The fourth proportional to 425.15, 636.86 and 242.01 is: 362.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.15 : 636.86 = 242.01 : x
  2. Step 2: Convert to fraction form
    425.15/636.86 = 242.01/x
  3. Step 3: Cross multiply
    425.15x = 636.86 × 242.01
  4. Step 4: Simplify right side
    425.15x = 154,125.28
  5. Step 5: Solve for x
    x = 154,125.28/425.15
  6. Step 6: Final answer
    x = 362.52

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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.