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Finding the Fourth Proportional to 984.62, 1,358.88 and 591.68

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Solution

The fourth proportional to 984.62, 1,358.88 and 591.68 is: 816.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.62 : 1,358.88 = 591.68 : x
  2. Step 2: Convert to fraction form
    984.62/1,358.88 = 591.68/x
  3. Step 3: Cross multiply
    984.62x = 1,358.88 × 591.68
  4. Step 4: Simplify right side
    984.62x = 804,022.12
  5. Step 5: Solve for x
    x = 804,022.12/984.62
  6. Step 6: Final answer
    x = 816.58

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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.