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Finding the Fourth Proportional to 603.95, 905.22 and 278.63

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Solution

The fourth proportional to 603.95, 905.22 and 278.63 is: 417.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    603.95 : 905.22 = 278.63 : x
  2. Step 2: Convert to fraction form
    603.95/905.22 = 278.63/x
  3. Step 3: Cross multiply
    603.95x = 905.22 × 278.63
  4. Step 4: Simplify right side
    603.95x = 252,220.06
  5. Step 5: Solve for x
    x = 252,220.06/603.95
  6. Step 6: Final answer
    x = 417.62

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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.