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Finding the Fourth Proportional to 307.55, 424.57 and 220.37

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Solution

The fourth proportional to 307.55, 424.57 and 220.37 is: 304.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.55 : 424.57 = 220.37 : x
  2. Step 2: Convert to fraction form
    307.55/424.57 = 220.37/x
  3. Step 3: Cross multiply
    307.55x = 424.57 × 220.37
  4. Step 4: Simplify right side
    307.55x = 93,562.00
  5. Step 5: Solve for x
    x = 93,562.00/307.55
  6. Step 6: Final answer
    x = 304.22

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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.