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Finding the Fourth Proportional to 1,044.51, 1,563.71 and 905.25

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Solution

The fourth proportional to 1,044.51, 1,563.71 and 905.25 is: 1,355.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,044.51 : 1,563.71 = 905.25 : x
  2. Step 2: Convert to fraction form
    1,044.51/1,563.71 = 905.25/x
  3. Step 3: Cross multiply
    1,044.51x = 1,563.71 × 905.25
  4. Step 4: Simplify right side
    1,044.51x = 1,415,543.95
  5. Step 5: Solve for x
    x = 1,415,543.95/1,044.51
  6. Step 6: Final answer
    x = 1,355.22

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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.