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Finding the Fourth Proportional to 3,128.01, 4,692.05 and 936.76

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Solution

The fourth proportional to 3,128.01, 4,692.05 and 936.76 is: 1,405.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.01 : 4,692.05 = 936.76 : x
  2. Step 2: Convert to fraction form
    3,128.01/4,692.05 = 936.76/x
  3. Step 3: Cross multiply
    3,128.01x = 4,692.05 × 936.76
  4. Step 4: Simplify right side
    3,128.01x = 4,395,324.76
  5. Step 5: Solve for x
    x = 4,395,324.76/3,128.01
  6. Step 6: Final answer
    x = 1,405.15

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1.5x scale

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.