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Finding the Fourth Proportional to 1,191.45, 1,644.37 and 694.25

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Solution

The fourth proportional to 1,191.45, 1,644.37 and 694.25 is: 958.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,191.45 : 1,644.37 = 694.25 : x
  2. Step 2: Convert to fraction form
    1,191.45/1,644.37 = 694.25/x
  3. Step 3: Cross multiply
    1,191.45x = 1,644.37 × 694.25
  4. Step 4: Simplify right side
    1,191.45x = 1,141,592.18
  5. Step 5: Solve for x
    x = 1,141,592.18/1,191.45
  6. Step 6: Final answer
    x = 958.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.