Home / 2,065.90-3,102.32-1,287.72

Finding the Fourth Proportional to 2,065.90, 3,102.32 and 1,287.72

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Solution

The fourth proportional to 2,065.90, 3,102.32 and 1,287.72 is: 1,933.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,065.90 : 3,102.32 = 1,287.72 : x
  2. Step 2: Convert to fraction form
    2,065.90/3,102.32 = 1,287.72/x
  3. Step 3: Cross multiply
    2,065.90x = 3,102.32 × 1,287.72
  4. Step 4: Simplify right side
    2,065.90x = 3,994,919.51
  5. Step 5: Solve for x
    x = 3,994,919.51/2,065.90
  6. Step 6: Final answer
    x = 1,933.74

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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.