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Finding the Fourth Proportional to 1,083.51, 1,495.26 and 641.46

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Solution

The fourth proportional to 1,083.51, 1,495.26 and 641.46 is: 885.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,083.51 : 1,495.26 = 641.46 : x
  2. Step 2: Convert to fraction form
    1,083.51/1,495.26 = 641.46/x
  3. Step 3: Cross multiply
    1,083.51x = 1,495.26 × 641.46
  4. Step 4: Simplify right side
    1,083.51x = 959,149.48
  5. Step 5: Solve for x
    x = 959,149.48/1,083.51
  6. Step 6: Final answer
    x = 885.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.