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Finding the Fourth Proportional to 307.05, 459.69 and 238.74

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Solution

The fourth proportional to 307.05, 459.69 and 238.74 is: 357.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.05 : 459.69 = 238.74 : x
  2. Step 2: Convert to fraction form
    307.05/459.69 = 238.74/x
  3. Step 3: Cross multiply
    307.05x = 459.69 × 238.74
  4. Step 4: Simplify right side
    307.05x = 109,746.39
  5. Step 5: Solve for x
    x = 109,746.39/307.05
  6. Step 6: Final answer
    x = 357.42

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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.