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Finding the Fourth Proportional to 307.12, 423.48 and 224.08

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Solution

The fourth proportional to 307.12, 423.48 and 224.08 is: 308.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.12 : 423.48 = 224.08 : x
  2. Step 2: Convert to fraction form
    307.12/423.48 = 224.08/x
  3. Step 3: Cross multiply
    307.12x = 423.48 × 224.08
  4. Step 4: Simplify right side
    307.12x = 94,893.40
  5. Step 5: Solve for x
    x = 94,893.40/307.12
  6. Step 6: Final answer
    x = 308.98

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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.