Home / 2,685.12-3,705.66-1,899.36

Finding the Fourth Proportional to 2,685.12, 3,705.66 and 1,899.36

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Solution

The fourth proportional to 2,685.12, 3,705.66 and 1,899.36 is: 2,621.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,685.12 : 3,705.66 = 1,899.36 : x
  2. Step 2: Convert to fraction form
    2,685.12/3,705.66 = 1,899.36/x
  3. Step 3: Cross multiply
    2,685.12x = 3,705.66 × 1,899.36
  4. Step 4: Simplify right side
    2,685.12x = 7,038,382.38
  5. Step 5: Solve for x
    x = 7,038,382.38/2,685.12
  6. Step 6: Final answer
    x = 2,621.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.