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Finding the Fourth Proportional to 851.20, 1,273.58 and 504.72

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Solution

The fourth proportional to 851.20, 1,273.58 and 504.72 is: 755.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    851.20 : 1,273.58 = 504.72 : x
  2. Step 2: Convert to fraction form
    851.20/1,273.58 = 504.72/x
  3. Step 3: Cross multiply
    851.20x = 1,273.58 × 504.72
  4. Step 4: Simplify right side
    851.20x = 642,801.30
  5. Step 5: Solve for x
    x = 642,801.30/851.20
  6. Step 6: Final answer
    x = 755.17

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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.