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Finding the Fourth Proportional to 307.73, 423.41 and 266.15

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Solution

The fourth proportional to 307.73, 423.41 and 266.15 is: 366.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.73 : 423.41 = 266.15 : x
  2. Step 2: Convert to fraction form
    307.73/423.41 = 266.15/x
  3. Step 3: Cross multiply
    307.73x = 423.41 × 266.15
  4. Step 4: Simplify right side
    307.73x = 112,690.57
  5. Step 5: Solve for x
    x = 112,690.57/307.73
  6. Step 6: Final answer
    x = 366.20

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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.