Home / 1,392.10-2,086.80-1,246.30

Finding the Fourth Proportional to 1,392.10, 2,086.80 and 1,246.30

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Solution

The fourth proportional to 1,392.10, 2,086.80 and 1,246.30 is: 1,868.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392.10 : 2,086.80 = 1,246.30 : x
  2. Step 2: Convert to fraction form
    1,392.10/2,086.80 = 1,246.30/x
  3. Step 3: Cross multiply
    1,392.10x = 2,086.80 × 1,246.30
  4. Step 4: Simplify right side
    1,392.10x = 2,600,778.84
  5. Step 5: Solve for x
    x = 2,600,778.84/1,392.10
  6. Step 6: Final answer
    x = 1,868.24

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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.