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Finding the Fourth Proportional to 1,429.93, 2,143 and 908.29

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Solution

The fourth proportional to 1,429.93, 2,143 and 908.29 is: 1,361.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,429.93 : 2,143 = 908.29 : x
  2. Step 2: Convert to fraction form
    1,429.93/2,143 = 908.29/x
  3. Step 3: Cross multiply
    1,429.93x = 2,143 × 908.29
  4. Step 4: Simplify right side
    1,429.93x = 1,946,465.47
  5. Step 5: Solve for x
    x = 1,946,465.47/1,429.93
  6. Step 6: Final answer
    x = 1,361.23

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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.