Home / 2,690.79-4,038.66-1,393.17

Finding the Fourth Proportional to 2,690.79, 4,038.66 and 1,393.17

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Solution

The fourth proportional to 2,690.79, 4,038.66 and 1,393.17 is: 2,091.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,690.79 : 4,038.66 = 1,393.17 : x
  2. Step 2: Convert to fraction form
    2,690.79/4,038.66 = 1,393.17/x
  3. Step 3: Cross multiply
    2,690.79x = 4,038.66 × 1,393.17
  4. Step 4: Simplify right side
    2,690.79x = 5,626,539.95
  5. Step 5: Solve for x
    x = 5,626,539.95/2,690.79
  6. Step 6: Final answer
    x = 2,091.04

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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.