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Finding the Fourth Proportional to 1,368.08, 2,051.94 and 380.96

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Solution

The fourth proportional to 1,368.08, 2,051.94 and 380.96 is: 571.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,368.08 : 2,051.94 = 380.96 : x
  2. Step 2: Convert to fraction form
    1,368.08/2,051.94 = 380.96/x
  3. Step 3: Cross multiply
    1,368.08x = 2,051.94 × 380.96
  4. Step 4: Simplify right side
    1,368.08x = 781,707.06
  5. Step 5: Solve for x
    x = 781,707.06/1,368.08
  6. Step 6: Final answer
    x = 571.39

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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.