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Finding the Fourth Proportional to 889.35, 1,334.13 and 427.35

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Solution

The fourth proportional to 889.35, 1,334.13 and 427.35 is: 641.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.35 : 1,334.13 = 427.35 : x
  2. Step 2: Convert to fraction form
    889.35/1,334.13 = 427.35/x
  3. Step 3: Cross multiply
    889.35x = 1,334.13 × 427.35
  4. Step 4: Simplify right side
    889.35x = 570,140.46
  5. Step 5: Solve for x
    x = 570,140.46/889.35
  6. Step 6: Final answer
    x = 641.08

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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.