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Finding the Fourth Proportional to 1,342.09, 2,012.94 and 520.27

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Solution

The fourth proportional to 1,342.09, 2,012.94 and 520.27 is: 780.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,342.09 : 2,012.94 = 520.27 : x
  2. Step 2: Convert to fraction form
    1,342.09/2,012.94 = 520.27/x
  3. Step 3: Cross multiply
    1,342.09x = 2,012.94 × 520.27
  4. Step 4: Simplify right side
    1,342.09x = 1,047,272.29
  5. Step 5: Solve for x
    x = 1,047,272.29/1,342.09
  6. Step 6: Final answer
    x = 780.33

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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.