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Finding the Fourth Proportional to 889.63, 1,227.68 and 540.31

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Solution

The fourth proportional to 889.63, 1,227.68 and 540.31 is: 745.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.63 : 1,227.68 = 540.31 : x
  2. Step 2: Convert to fraction form
    889.63/1,227.68 = 540.31/x
  3. Step 3: Cross multiply
    889.63x = 1,227.68 × 540.31
  4. Step 4: Simplify right side
    889.63x = 663,327.78
  5. Step 5: Solve for x
    x = 663,327.78/889.63
  6. Step 6: Final answer
    x = 745.62

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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.