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Finding the Fourth Proportional to 307.26, 460.91 and 90.85

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Solution

The fourth proportional to 307.26, 460.91 and 90.85 is: 136.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.26 : 460.91 = 90.85 : x
  2. Step 2: Convert to fraction form
    307.26/460.91 = 90.85/x
  3. Step 3: Cross multiply
    307.26x = 460.91 × 90.85
  4. Step 4: Simplify right side
    307.26x = 41,870.91
  5. Step 5: Solve for x
    x = 41,870.91/307.26
  6. Step 6: Final answer
    x = 136.27

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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.