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Finding the Fourth Proportional to 307.67, 424.72 and 219.17

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Solution

The fourth proportional to 307.67, 424.72 and 219.17 is: 302.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.67 : 424.72 = 219.17 : x
  2. Step 2: Convert to fraction form
    307.67/424.72 = 219.17/x
  3. Step 3: Cross multiply
    307.67x = 424.72 × 219.17
  4. Step 4: Simplify right side
    307.67x = 93,085.88
  5. Step 5: Solve for x
    x = 93,085.88/307.67
  6. Step 6: Final answer
    x = 302.55

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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.