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Finding the Fourth Proportional to 1,690.59, 2,536.97 and 824.43

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Solution

The fourth proportional to 1,690.59, 2,536.97 and 824.43 is: 1,237.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,690.59 : 2,536.97 = 824.43 : x
  2. Step 2: Convert to fraction form
    1,690.59/2,536.97 = 824.43/x
  3. Step 3: Cross multiply
    1,690.59x = 2,536.97 × 824.43
  4. Step 4: Simplify right side
    1,690.59x = 2,091,554.18
  5. Step 5: Solve for x
    x = 2,091,554.18/1,690.59
  6. Step 6: Final answer
    x = 1,237.17

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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.