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Finding the Fourth Proportional to 889.57, 1,334.39 and 240.31

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Solution

The fourth proportional to 889.57, 1,334.39 and 240.31 is: 360.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.57 : 1,334.39 = 240.31 : x
  2. Step 2: Convert to fraction form
    889.57/1,334.39 = 240.31/x
  3. Step 3: Cross multiply
    889.57x = 1,334.39 × 240.31
  4. Step 4: Simplify right side
    889.57x = 320,666.06
  5. Step 5: Solve for x
    x = 320,666.06/889.57
  6. Step 6: Final answer
    x = 360.47

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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.