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Finding the Fourth Proportional to 307.63, 424.49 and 202.69

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Solution

The fourth proportional to 307.63, 424.49 and 202.69 is: 279.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.63 : 424.49 = 202.69 : x
  2. Step 2: Convert to fraction form
    307.63/424.49 = 202.69/x
  3. Step 3: Cross multiply
    307.63x = 424.49 × 202.69
  4. Step 4: Simplify right side
    307.63x = 86,038.15
  5. Step 5: Solve for x
    x = 86,038.15/307.63
  6. Step 6: Final answer
    x = 279.68

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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.