Home / 1,850.85-2,765.75-1,328.40

Finding the Fourth Proportional to 1,850.85, 2,765.75 and 1,328.40

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Solution

The fourth proportional to 1,850.85, 2,765.75 and 1,328.40 is: 1,985.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,850.85 : 2,765.75 = 1,328.40 : x
  2. Step 2: Convert to fraction form
    1,850.85/2,765.75 = 1,328.40/x
  3. Step 3: Cross multiply
    1,850.85x = 2,765.75 × 1,328.40
  4. Step 4: Simplify right side
    1,850.85x = 3,674,015.66
  5. Step 5: Solve for x
    x = 3,674,015.66/1,850.85
  6. Step 6: Final answer
    x = 1,985.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.