Home / 2,321.40-3,203.52-1,389.90

Finding the Fourth Proportional to 2,321.40, 3,203.52 and 1,389.90

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Solution

The fourth proportional to 2,321.40, 3,203.52 and 1,389.90 is: 1,918.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,321.40 : 3,203.52 = 1,389.90 : x
  2. Step 2: Convert to fraction form
    2,321.40/3,203.52 = 1,389.90/x
  3. Step 3: Cross multiply
    2,321.40x = 3,203.52 × 1,389.90
  4. Step 4: Simplify right side
    2,321.40x = 4,452,572.45
  5. Step 5: Solve for x
    x = 4,452,572.45/2,321.40
  6. Step 6: Final answer
    x = 1,918.05

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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.