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Finding the Fourth Proportional to 307.04, 423.12 and 229.28

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Solution

The fourth proportional to 307.04, 423.12 and 229.28 is: 315.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.04 : 423.12 = 229.28 : x
  2. Step 2: Convert to fraction form
    307.04/423.12 = 229.28/x
  3. Step 3: Cross multiply
    307.04x = 423.12 × 229.28
  4. Step 4: Simplify right side
    307.04x = 97,012.95
  5. Step 5: Solve for x
    x = 97,012.95/307.04
  6. Step 6: Final answer
    x = 315.96

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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.