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Finding the Fourth Proportional to 901.91, 1,245.44 and 694.15

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Solution

The fourth proportional to 901.91, 1,245.44 and 694.15 is: 958.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.91 : 1,245.44 = 694.15 : x
  2. Step 2: Convert to fraction form
    901.91/1,245.44 = 694.15/x
  3. Step 3: Cross multiply
    901.91x = 1,245.44 × 694.15
  4. Step 4: Simplify right side
    901.91x = 864,522.18
  5. Step 5: Solve for x
    x = 864,522.18/901.91
  6. Step 6: Final answer
    x = 958.55

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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.