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Finding the Fourth Proportional to 939.08, 1,294.02 and 889.67

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Solution

The fourth proportional to 939.08, 1,294.02 and 889.67 is: 1,225.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    939.08 : 1,294.02 = 889.67 : x
  2. Step 2: Convert to fraction form
    939.08/1,294.02 = 889.67/x
  3. Step 3: Cross multiply
    939.08x = 1,294.02 × 889.67
  4. Step 4: Simplify right side
    939.08x = 1,151,244.30
  5. Step 5: Solve for x
    x = 1,151,244.30/939.08
  6. Step 6: Final answer
    x = 1,225.93

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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.