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Finding the Fourth Proportional to 906.95, 1,352.29 and 890.55

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Solution

The fourth proportional to 906.95, 1,352.29 and 890.55 is: 1,327.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.95 : 1,352.29 = 890.55 : x
  2. Step 2: Convert to fraction form
    906.95/1,352.29 = 890.55/x
  3. Step 3: Cross multiply
    906.95x = 1,352.29 × 890.55
  4. Step 4: Simplify right side
    906.95x = 1,204,281.86
  5. Step 5: Solve for x
    x = 1,204,281.86/906.95
  6. Step 6: Final answer
    x = 1,327.84

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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.