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Finding the Fourth Proportional to 402.63, 603.40 and 185.73

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Solution

The fourth proportional to 402.63, 603.40 and 185.73 is: 278.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.63 : 603.40 = 185.73 : x
  2. Step 2: Convert to fraction form
    402.63/603.40 = 185.73/x
  3. Step 3: Cross multiply
    402.63x = 603.40 × 185.73
  4. Step 4: Simplify right side
    402.63x = 112,069.48
  5. Step 5: Solve for x
    x = 112,069.48/402.63
  6. Step 6: Final answer
    x = 278.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.