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Finding the Fourth Proportional to 307.77, 424.44 and 208.14

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Solution

The fourth proportional to 307.77, 424.44 and 208.14 is: 287.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.77 : 424.44 = 208.14 : x
  2. Step 2: Convert to fraction form
    307.77/424.44 = 208.14/x
  3. Step 3: Cross multiply
    307.77x = 424.44 × 208.14
  4. Step 4: Simplify right side
    307.77x = 88,342.94
  5. Step 5: Solve for x
    x = 88,342.94/307.77
  6. Step 6: Final answer
    x = 287.04

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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.