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Finding the Fourth Proportional to 307.06, 423.12 and 219.58

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Solution

The fourth proportional to 307.06, 423.12 and 219.58 is: 302.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.06 : 423.12 = 219.58 : x
  2. Step 2: Convert to fraction form
    307.06/423.12 = 219.58/x
  3. Step 3: Cross multiply
    307.06x = 423.12 × 219.58
  4. Step 4: Simplify right side
    307.06x = 92,908.46
  5. Step 5: Solve for x
    x = 92,908.46/307.06
  6. Step 6: Final answer
    x = 302.58

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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.