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Finding the Fourth Proportional to 1,400.30, 2,099.92 and 412.92

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Solution

The fourth proportional to 1,400.30, 2,099.92 and 412.92 is: 619.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,400.30 : 2,099.92 = 412.92 : x
  2. Step 2: Convert to fraction form
    1,400.30/2,099.92 = 412.92/x
  3. Step 3: Cross multiply
    1,400.30x = 2,099.92 × 412.92
  4. Step 4: Simplify right side
    1,400.30x = 867,098.97
  5. Step 5: Solve for x
    x = 867,098.97/1,400.30
  6. Step 6: Final answer
    x = 619.22

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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.