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Finding the Fourth Proportional to 984.68, 1,359.04 and 611.81

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Solution

The fourth proportional to 984.68, 1,359.04 and 611.81 is: 844.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.68 : 1,359.04 = 611.81 : x
  2. Step 2: Convert to fraction form
    984.68/1,359.04 = 611.81/x
  3. Step 3: Cross multiply
    984.68x = 1,359.04 × 611.81
  4. Step 4: Simplify right side
    984.68x = 831,465.94
  5. Step 5: Solve for x
    x = 831,465.94/984.68
  6. Step 6: Final answer
    x = 844.41

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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.