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Finding the Fourth Proportional to 307.78, 423.29 and 244.87

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Solution

The fourth proportional to 307.78, 423.29 and 244.87 is: 336.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.78 : 423.29 = 244.87 : x
  2. Step 2: Convert to fraction form
    307.78/423.29 = 244.87/x
  3. Step 3: Cross multiply
    307.78x = 423.29 × 244.87
  4. Step 4: Simplify right side
    307.78x = 103,649.80
  5. Step 5: Solve for x
    x = 103,649.80/307.78
  6. Step 6: Final answer
    x = 336.77

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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.