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Finding the Fourth Proportional to 1,094.82, 1,640.37 and 661.06

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Solution

The fourth proportional to 1,094.82, 1,640.37 and 661.06 is: 990.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,094.82 : 1,640.37 = 661.06 : x
  2. Step 2: Convert to fraction form
    1,094.82/1,640.37 = 661.06/x
  3. Step 3: Cross multiply
    1,094.82x = 1,640.37 × 661.06
  4. Step 4: Simplify right side
    1,094.82x = 1,084,382.99
  5. Step 5: Solve for x
    x = 1,084,382.99/1,094.82
  6. Step 6: Final answer
    x = 990.47

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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.