Home / 1,930.20-2,900.70-1,692.60

Finding the Fourth Proportional to 1,930.20, 2,900.70 and 1,692.60

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Solution

The fourth proportional to 1,930.20, 2,900.70 and 1,692.60 is: 2,543.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,930.20 : 2,900.70 = 1,692.60 : x
  2. Step 2: Convert to fraction form
    1,930.20/2,900.70 = 1,692.60/x
  3. Step 3: Cross multiply
    1,930.20x = 2,900.70 × 1,692.60
  4. Step 4: Simplify right side
    1,930.20x = 4,909,724.82
  5. Step 5: Solve for x
    x = 4,909,724.82/1,930.20
  6. Step 6: Final answer
    x = 2,543.64

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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.