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Finding the Fourth Proportional to 889.25, 1,328.48 and 743.45

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Solution

The fourth proportional to 889.25, 1,328.48 and 743.45 is: 1,110.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.25 : 1,328.48 = 743.45 : x
  2. Step 2: Convert to fraction form
    889.25/1,328.48 = 743.45/x
  3. Step 3: Cross multiply
    889.25x = 1,328.48 × 743.45
  4. Step 4: Simplify right side
    889.25x = 987,656.60
  5. Step 5: Solve for x
    x = 987,656.60/889.25
  6. Step 6: Final answer
    x = 1,110.66

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.