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Finding the Fourth Proportional to 307.56, 424.23 and 197.10

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Solution

The fourth proportional to 307.56, 424.23 and 197.10 is: 271.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.56 : 424.23 = 197.10 : x
  2. Step 2: Convert to fraction form
    307.56/424.23 = 197.10/x
  3. Step 3: Cross multiply
    307.56x = 424.23 × 197.10
  4. Step 4: Simplify right side
    307.56x = 83,615.73
  5. Step 5: Solve for x
    x = 83,615.73/307.56
  6. Step 6: Final answer
    x = 271.87

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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.