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Finding the Fourth Proportional to 1,094.84, 1,639.01 and 660.68

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Solution

The fourth proportional to 1,094.84, 1,639.01 and 660.68 is: 989.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,094.84 : 1,639.01 = 660.68 : x
  2. Step 2: Convert to fraction form
    1,094.84/1,639.01 = 660.68/x
  3. Step 3: Cross multiply
    1,094.84x = 1,639.01 × 660.68
  4. Step 4: Simplify right side
    1,094.84x = 1,082,861.13
  5. Step 5: Solve for x
    x = 1,082,861.13/1,094.84
  6. Step 6: Final answer
    x = 989.06

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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.