Home / 1,269.60-1,905.11-620.34

Finding the Fourth Proportional to 1,269.60, 1,905.11 and 620.34

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Solution

The fourth proportional to 1,269.60, 1,905.11 and 620.34 is: 930.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,269.60 : 1,905.11 = 620.34 : x
  2. Step 2: Convert to fraction form
    1,269.60/1,905.11 = 620.34/x
  3. Step 3: Cross multiply
    1,269.60x = 1,905.11 × 620.34
  4. Step 4: Simplify right side
    1,269.60x = 1,181,812.84
  5. Step 5: Solve for x
    x = 1,181,812.84/1,269.60
  6. Step 6: Final answer
    x = 930.85

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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.