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Finding the Fourth Proportional to 2,085.50, 3,128.44 and 546.50

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Solution

The fourth proportional to 2,085.50, 3,128.44 and 546.50 is: 819.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,085.50 : 3,128.44 = 546.50 : x
  2. Step 2: Convert to fraction form
    2,085.50/3,128.44 = 546.50/x
  3. Step 3: Cross multiply
    2,085.50x = 3,128.44 × 546.50
  4. Step 4: Simplify right side
    2,085.50x = 1,709,692.46
  5. Step 5: Solve for x
    x = 1,709,692.46/2,085.50
  6. Step 6: Final answer
    x = 819.80

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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.