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Finding the Fourth Proportional to 1,040.73, 1,436.21 and 568.63

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Solution

The fourth proportional to 1,040.73, 1,436.21 and 568.63 is: 784.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,040.73 : 1,436.21 = 568.63 : x
  2. Step 2: Convert to fraction form
    1,040.73/1,436.21 = 568.63/x
  3. Step 3: Cross multiply
    1,040.73x = 1,436.21 × 568.63
  4. Step 4: Simplify right side
    1,040.73x = 816,672.09
  5. Step 5: Solve for x
    x = 816,672.09/1,040.73
  6. Step 6: Final answer
    x = 784.71

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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.