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Finding the Fourth Proportional to 1,340.56, 2,009.21 and 569.44

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Solution

The fourth proportional to 1,340.56, 2,009.21 and 569.44 is: 853.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,340.56 : 2,009.21 = 569.44 : x
  2. Step 2: Convert to fraction form
    1,340.56/2,009.21 = 569.44/x
  3. Step 3: Cross multiply
    1,340.56x = 2,009.21 × 569.44
  4. Step 4: Simplify right side
    1,340.56x = 1,144,120.94
  5. Step 5: Solve for x
    x = 1,144,120.94/1,340.56
  6. Step 6: Final answer
    x = 853.47

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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.