Home / 1,379.10-2,065.73-1,085.20

Finding the Fourth Proportional to 1,379.10, 2,065.73 and 1,085.20

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Solution

The fourth proportional to 1,379.10, 2,065.73 and 1,085.20 is: 1,625.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,379.10 : 2,065.73 = 1,085.20 : x
  2. Step 2: Convert to fraction form
    1,379.10/2,065.73 = 1,085.20/x
  3. Step 3: Cross multiply
    1,379.10x = 2,065.73 × 1,085.20
  4. Step 4: Simplify right side
    1,379.10x = 2,241,727.35
  5. Step 5: Solve for x
    x = 2,241,727.35/1,379.10
  6. Step 6: Final answer
    x = 1,625.50

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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.