Home / 2,321.68-3,203.40-1,390.48

Finding the Fourth Proportional to 2,321.68, 3,203.40 and 1,390.48

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Solution

The fourth proportional to 2,321.68, 3,203.40 and 1,390.48 is: 1,918.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,321.68 : 3,203.40 = 1,390.48 : x
  2. Step 2: Convert to fraction form
    2,321.68/3,203.40 = 1,390.48/x
  3. Step 3: Cross multiply
    2,321.68x = 3,203.40 × 1,390.48
  4. Step 4: Simplify right side
    2,321.68x = 4,454,263.63
  5. Step 5: Solve for x
    x = 4,454,263.63/2,321.68
  6. Step 6: Final answer
    x = 1,918.55

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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.