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Finding the Fourth Proportional to 1,010.96, 1,393.73 and 637.75

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Solution

The fourth proportional to 1,010.96, 1,393.73 and 637.75 is: 879.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,010.96 : 1,393.73 = 637.75 : x
  2. Step 2: Convert to fraction form
    1,010.96/1,393.73 = 637.75/x
  3. Step 3: Cross multiply
    1,010.96x = 1,393.73 × 637.75
  4. Step 4: Simplify right side
    1,010.96x = 888,851.31
  5. Step 5: Solve for x
    x = 888,851.31/1,010.96
  6. Step 6: Final answer
    x = 879.22

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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.