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Finding the Fourth Proportional to 1,684.31, 2,526.46 and 817.88

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Solution

The fourth proportional to 1,684.31, 2,526.46 and 817.88 is: 1,226.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,684.31 : 2,526.46 = 817.88 : x
  2. Step 2: Convert to fraction form
    1,684.31/2,526.46 = 817.88/x
  3. Step 3: Cross multiply
    1,684.31x = 2,526.46 × 817.88
  4. Step 4: Simplify right side
    1,684.31x = 2,066,326.43
  5. Step 5: Solve for x
    x = 2,066,326.43/1,684.31
  6. Step 6: Final answer
    x = 1,226.81

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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.