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Finding the Fourth Proportional to 2,323.70, 3,206.70 and 1,392.20

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Solution

The fourth proportional to 2,323.70, 3,206.70 and 1,392.20 is: 1,921.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,323.70 : 3,206.70 = 1,392.20 : x
  2. Step 2: Convert to fraction form
    2,323.70/3,206.70 = 1,392.20/x
  3. Step 3: Cross multiply
    2,323.70x = 3,206.70 × 1,392.20
  4. Step 4: Simplify right side
    2,323.70x = 4,464,351.71
  5. Step 5: Solve for x
    x = 4,464,351.71/2,323.70
  6. Step 6: Final answer
    x = 1,921.23

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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.