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Finding the Fourth Proportional to 3,128.48, 4,692.48 and 1,903.76

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Solution

The fourth proportional to 3,128.48, 4,692.48 and 1,903.76 is: 2,855.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.48 : 4,692.48 = 1,903.76 : x
  2. Step 2: Convert to fraction form
    3,128.48/4,692.48 = 1,903.76/x
  3. Step 3: Cross multiply
    3,128.48x = 4,692.48 × 1,903.76
  4. Step 4: Simplify right side
    3,128.48x = 8,933,355.72
  5. Step 5: Solve for x
    x = 8,933,355.72/3,128.48
  6. Step 6: Final answer
    x = 2,855.49

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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.