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Finding the Fourth Proportional to 307.91, 425.01 and 203.08

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Solution

The fourth proportional to 307.91, 425.01 and 203.08 is: 280.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.91 : 425.01 = 203.08 : x
  2. Step 2: Convert to fraction form
    307.91/425.01 = 203.08/x
  3. Step 3: Cross multiply
    307.91x = 425.01 × 203.08
  4. Step 4: Simplify right side
    307.91x = 86,307.89
  5. Step 5: Solve for x
    x = 86,307.89/307.91
  6. Step 6: Final answer
    x = 280.30

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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.