Home / 2,690.40-3,707.50-1,903.08

Finding the Fourth Proportional to 2,690.40, 3,707.50 and 1,903.08

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Solution

The fourth proportional to 2,690.40, 3,707.50 and 1,903.08 is: 2,622.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,690.40 : 3,707.50 = 1,903.08 : x
  2. Step 2: Convert to fraction form
    2,690.40/3,707.50 = 1,903.08/x
  3. Step 3: Cross multiply
    2,690.40x = 3,707.50 × 1,903.08
  4. Step 4: Simplify right side
    2,690.40x = 7,055,669.10
  5. Step 5: Solve for x
    x = 7,055,669.10/2,690.40
  6. Step 6: Final answer
    x = 2,622.54

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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.