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Finding the Fourth Proportional to 681.64, 1,019.58 and 537.64

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Solution

The fourth proportional to 681.64, 1,019.58 and 537.64 is: 804.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.64 : 1,019.58 = 537.64 : x
  2. Step 2: Convert to fraction form
    681.64/1,019.58 = 537.64/x
  3. Step 3: Cross multiply
    681.64x = 1,019.58 × 537.64
  4. Step 4: Simplify right side
    681.64x = 548,166.99
  5. Step 5: Solve for x
    x = 548,166.99/681.64
  6. Step 6: Final answer
    x = 804.19

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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.