Home / 2,690.47-4,030.84-1,392.85

Finding the Fourth Proportional to 2,690.47, 4,030.84 and 1,392.85

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Solution

The fourth proportional to 2,690.47, 4,030.84 and 1,392.85 is: 2,086.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,690.47 : 4,030.84 = 1,392.85 : x
  2. Step 2: Convert to fraction form
    2,690.47/4,030.84 = 1,392.85/x
  3. Step 3: Cross multiply
    2,690.47x = 4,030.84 × 1,392.85
  4. Step 4: Simplify right side
    2,690.47x = 5,614,355.49
  5. Step 5: Solve for x
    x = 5,614,355.49/2,690.47
  6. Step 6: Final answer
    x = 2,086.76

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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.