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Finding the Fourth Proportional to 816.89, 1,126.91 and 568.62

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Solution

The fourth proportional to 816.89, 1,126.91 and 568.62 is: 784.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    816.89 : 1,126.91 = 568.62 : x
  2. Step 2: Convert to fraction form
    816.89/1,126.91 = 568.62/x
  3. Step 3: Cross multiply
    816.89x = 1,126.91 × 568.62
  4. Step 4: Simplify right side
    816.89x = 640,784.99
  5. Step 5: Solve for x
    x = 640,784.99/816.89
  6. Step 6: Final answer
    x = 784.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.