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Finding the Fourth Proportional to 307.06, 423.26 and 208.65

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Solution

The fourth proportional to 307.06, 423.26 and 208.65 is: 287.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.06 : 423.26 = 208.65 : x
  2. Step 2: Convert to fraction form
    307.06/423.26 = 208.65/x
  3. Step 3: Cross multiply
    307.06x = 423.26 × 208.65
  4. Step 4: Simplify right side
    307.06x = 88,311.60
  5. Step 5: Solve for x
    x = 88,311.60/307.06
  6. Step 6: Final answer
    x = 287.60

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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.