Home / 1,398.37-1,924.92-1,209.23

Finding the Fourth Proportional to 1,398.37, 1,924.92 and 1,209.23

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Solution

The fourth proportional to 1,398.37, 1,924.92 and 1,209.23 is: 1,664.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398.37 : 1,924.92 = 1,209.23 : x
  2. Step 2: Convert to fraction form
    1,398.37/1,924.92 = 1,209.23/x
  3. Step 3: Cross multiply
    1,398.37x = 1,924.92 × 1,209.23
  4. Step 4: Simplify right side
    1,398.37x = 2,327,671.01
  5. Step 5: Solve for x
    x = 2,327,671.01/1,398.37
  6. Step 6: Final answer
    x = 1,664.56

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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.