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Finding the Fourth Proportional to 307.88, 424.68 and 197.24

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Solution

The fourth proportional to 307.88, 424.68 and 197.24 is: 272.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.88 : 424.68 = 197.24 : x
  2. Step 2: Convert to fraction form
    307.88/424.68 = 197.24/x
  3. Step 3: Cross multiply
    307.88x = 424.68 × 197.24
  4. Step 4: Simplify right side
    307.88x = 83,763.88
  5. Step 5: Solve for x
    x = 83,763.88/307.88
  6. Step 6: Final answer
    x = 272.07

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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.