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Finding the Fourth Proportional to 1,429.94, 2,143.73 and 608.11

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Solution

The fourth proportional to 1,429.94, 2,143.73 and 608.11 is: 911.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,429.94 : 2,143.73 = 608.11 : x
  2. Step 2: Convert to fraction form
    1,429.94/2,143.73 = 608.11/x
  3. Step 3: Cross multiply
    1,429.94x = 2,143.73 × 608.11
  4. Step 4: Simplify right side
    1,429.94x = 1,303,619.81
  5. Step 5: Solve for x
    x = 1,303,619.81/1,429.94
  6. Step 6: Final answer
    x = 911.66

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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.