Home / 2,085.40-3,128.85-975.81

Finding the Fourth Proportional to 2,085.40, 3,128.85 and 975.81

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Solution

The fourth proportional to 2,085.40, 3,128.85 and 975.81 is: 1,464.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,085.40 : 3,128.85 = 975.81 : x
  2. Step 2: Convert to fraction form
    2,085.40/3,128.85 = 975.81/x
  3. Step 3: Cross multiply
    2,085.40x = 3,128.85 × 975.81
  4. Step 4: Simplify right side
    2,085.40x = 3,053,163.12
  5. Step 5: Solve for x
    x = 3,053,163.12/2,085.40
  6. Step 6: Final answer
    x = 1,464.07

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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.