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Finding the Fourth Proportional to 1,945.20, 2,918.22 and 904.44

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Solution

The fourth proportional to 1,945.20, 2,918.22 and 904.44 is: 1,356.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,945.20 : 2,918.22 = 904.44 : x
  2. Step 2: Convert to fraction form
    1,945.20/2,918.22 = 904.44/x
  3. Step 3: Cross multiply
    1,945.20x = 2,918.22 × 904.44
  4. Step 4: Simplify right side
    1,945.20x = 2,639,354.90
  5. Step 5: Solve for x
    x = 2,639,354.90/1,945.20
  6. Step 6: Final answer
    x = 1,356.86

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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.