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Finding the Fourth Proportional to 307.36, 423.48 and 203.68

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Solution

The fourth proportional to 307.36, 423.48 and 203.68 is: 280.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.36 : 423.48 = 203.68 : x
  2. Step 2: Convert to fraction form
    307.36/423.48 = 203.68/x
  3. Step 3: Cross multiply
    307.36x = 423.48 × 203.68
  4. Step 4: Simplify right side
    307.36x = 86,254.41
  5. Step 5: Solve for x
    x = 86,254.41/307.36
  6. Step 6: Final answer
    x = 280.63

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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.