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Finding the Fourth Proportional to 984.84, 1,355.58 and 911.94

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Solution

The fourth proportional to 984.84, 1,355.58 and 911.94 is: 1,255.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.84 : 1,355.58 = 911.94 : x
  2. Step 2: Convert to fraction form
    984.84/1,355.58 = 911.94/x
  3. Step 3: Cross multiply
    984.84x = 1,355.58 × 911.94
  4. Step 4: Simplify right side
    984.84x = 1,236,207.63
  5. Step 5: Solve for x
    x = 1,236,207.63/984.84
  6. Step 6: Final answer
    x = 1,255.24

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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.