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Finding the Fourth Proportional to 1,984.54, 2,976.92 and 523.70

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Solution

The fourth proportional to 1,984.54, 2,976.92 and 523.70 is: 785.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,984.54 : 2,976.92 = 523.70 : x
  2. Step 2: Convert to fraction form
    1,984.54/2,976.92 = 523.70/x
  3. Step 3: Cross multiply
    1,984.54x = 2,976.92 × 523.70
  4. Step 4: Simplify right side
    1,984.54x = 1,559,013.00
  5. Step 5: Solve for x
    x = 1,559,013.00/1,984.54
  6. Step 6: Final answer
    x = 785.58

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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.