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Finding the Fourth Proportional to 1,273.44, 1,909.52 and 451.60

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Solution

The fourth proportional to 1,273.44, 1,909.52 and 451.60 is: 677.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,273.44 : 1,909.52 = 451.60 : x
  2. Step 2: Convert to fraction form
    1,273.44/1,909.52 = 451.60/x
  3. Step 3: Cross multiply
    1,273.44x = 1,909.52 × 451.60
  4. Step 4: Simplify right side
    1,273.44x = 862,339.23
  5. Step 5: Solve for x
    x = 862,339.23/1,273.44
  6. Step 6: Final answer
    x = 677.17

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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.