Home / 1,938.12-2,673.72-1,230.90

Finding the Fourth Proportional to 1,938.12, 2,673.72 and 1,230.90

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Solution

The fourth proportional to 1,938.12, 2,673.72 and 1,230.90 is: 1,698.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,938.12 : 2,673.72 = 1,230.90 : x
  2. Step 2: Convert to fraction form
    1,938.12/2,673.72 = 1,230.90/x
  3. Step 3: Cross multiply
    1,938.12x = 2,673.72 × 1,230.90
  4. Step 4: Simplify right side
    1,938.12x = 3,291,081.95
  5. Step 5: Solve for x
    x = 3,291,081.95/1,938.12
  6. Step 6: Final answer
    x = 1,698.08

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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.