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Finding the Fourth Proportional to 889.25, 1,334.14 and 426.89

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Solution

The fourth proportional to 889.25, 1,334.14 and 426.89 is: 640.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.25 : 1,334.14 = 426.89 : x
  2. Step 2: Convert to fraction form
    889.25/1,334.14 = 426.89/x
  3. Step 3: Cross multiply
    889.25x = 1,334.14 × 426.89
  4. Step 4: Simplify right side
    889.25x = 569,533.29
  5. Step 5: Solve for x
    x = 569,533.29/889.25
  6. Step 6: Final answer
    x = 640.47

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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.