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Finding the Fourth Proportional to 307.39, 424 and 190.95

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Solution

The fourth proportional to 307.39, 424 and 190.95 is: 263.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.39 : 424 = 190.95 : x
  2. Step 2: Convert to fraction form
    307.39/424 = 190.95/x
  3. Step 3: Cross multiply
    307.39x = 424 × 190.95
  4. Step 4: Simplify right side
    307.39x = 80,962.80
  5. Step 5: Solve for x
    x = 80,962.80/307.39
  6. Step 6: Final answer
    x = 263.39

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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.