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Finding the Fourth Proportional to 1,343.63, 2,015.96 and 521.96

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Solution

The fourth proportional to 1,343.63, 2,015.96 and 521.96 is: 783.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,343.63 : 2,015.96 = 521.96 : x
  2. Step 2: Convert to fraction form
    1,343.63/2,015.96 = 521.96/x
  3. Step 3: Cross multiply
    1,343.63x = 2,015.96 × 521.96
  4. Step 4: Simplify right side
    1,343.63x = 1,052,237.79
  5. Step 5: Solve for x
    x = 1,052,237.79/1,343.63
  6. Step 6: Final answer
    x = 783.13

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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.