Home / 1,451.80-2,004.06-1,221.40

Finding the Fourth Proportional to 1,451.80, 2,004.06 and 1,221.40

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Solution

The fourth proportional to 1,451.80, 2,004.06 and 1,221.40 is: 1,686.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,451.80 : 2,004.06 = 1,221.40 : x
  2. Step 2: Convert to fraction form
    1,451.80/2,004.06 = 1,221.40/x
  3. Step 3: Cross multiply
    1,451.80x = 2,004.06 × 1,221.40
  4. Step 4: Simplify right side
    1,451.80x = 2,447,758.88
  5. Step 5: Solve for x
    x = 2,447,758.88/1,451.80
  6. Step 6: Final answer
    x = 1,686.02

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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.