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Finding the Fourth Proportional to 984.86, 1,359.36 and 611.62

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Solution

The fourth proportional to 984.86, 1,359.36 and 611.62 is: 844.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.86 : 1,359.36 = 611.62 : x
  2. Step 2: Convert to fraction form
    984.86/1,359.36 = 611.62/x
  3. Step 3: Cross multiply
    984.86x = 1,359.36 × 611.62
  4. Step 4: Simplify right side
    984.86x = 831,411.76
  5. Step 5: Solve for x
    x = 831,411.76/984.86
  6. Step 6: Final answer
    x = 844.19

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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.