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Finding the Fourth Proportional to 880,920.72, 1,321,578 and 281,917.80

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Solution

The fourth proportional to 880,920.72, 1,321,578 and 281,917.80 is: 422,939.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    880,920.72 : 1,321,578 = 281,917.80 : x
  2. Step 2: Convert to fraction form
    880,920.72/1,321,578 = 281,917.80/x
  3. Step 3: Cross multiply
    880,920.72x = 1,321,578 × 281,917.80
  4. Step 4: Simplify right side
    880,920.72x = 372,576,362,288.40
  5. Step 5: Solve for x
    x = 372,576,362,288.40/880,920.72
  6. Step 6: Final answer
    x = 422,939.72

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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.