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Finding the Fourth Proportional to 694.37, 1,040.59 and 539.59

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Solution

The fourth proportional to 694.37, 1,040.59 and 539.59 is: 808.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.37 : 1,040.59 = 539.59 : x
  2. Step 2: Convert to fraction form
    694.37/1,040.59 = 539.59/x
  3. Step 3: Cross multiply
    694.37x = 1,040.59 × 539.59
  4. Step 4: Simplify right side
    694.37x = 561,491.96
  5. Step 5: Solve for x
    x = 561,491.96/694.37
  6. Step 6: Final answer
    x = 808.64

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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.