Home / 1,269.12-1,905.05-1,065.91

Finding the Fourth Proportional to 1,269.12, 1,905.05 and 1,065.91

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Solution

The fourth proportional to 1,269.12, 1,905.05 and 1,065.91 is: 1,600.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,269.12 : 1,905.05 = 1,065.91 : x
  2. Step 2: Convert to fraction form
    1,269.12/1,905.05 = 1,065.91/x
  3. Step 3: Cross multiply
    1,269.12x = 1,905.05 × 1,065.91
  4. Step 4: Simplify right side
    1,269.12x = 2,030,611.85
  5. Step 5: Solve for x
    x = 2,030,611.85/1,269.12
  6. Step 6: Final answer
    x = 1,600.02

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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.