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Finding the Fourth Proportional to 1,396.81, 2,095.23 and 666.22

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Solution

The fourth proportional to 1,396.81, 2,095.23 and 666.22 is: 999.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,396.81 : 2,095.23 = 666.22 : x
  2. Step 2: Convert to fraction form
    1,396.81/2,095.23 = 666.22/x
  3. Step 3: Cross multiply
    1,396.81x = 2,095.23 × 666.22
  4. Step 4: Simplify right side
    1,396.81x = 1,395,881.04
  5. Step 5: Solve for x
    x = 1,395,881.04/1,396.81
  6. Step 6: Final answer
    x = 999.33

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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.