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Finding the Fourth Proportional to 307.63, 424.79 and 245.73

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Solution

The fourth proportional to 307.63, 424.79 and 245.73 is: 339.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.63 : 424.79 = 245.73 : x
  2. Step 2: Convert to fraction form
    307.63/424.79 = 245.73/x
  3. Step 3: Cross multiply
    307.63x = 424.79 × 245.73
  4. Step 4: Simplify right side
    307.63x = 104,386.31
  5. Step 5: Solve for x
    x = 104,386.31/307.63
  6. Step 6: Final answer
    x = 339.32

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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.