Home / 1,485.40-2,221.62-1,213.24

Finding the Fourth Proportional to 1,485.40, 2,221.62 and 1,213.24

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Solution

The fourth proportional to 1,485.40, 2,221.62 and 1,213.24 is: 1,814.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.40 : 2,221.62 = 1,213.24 : x
  2. Step 2: Convert to fraction form
    1,485.40/2,221.62 = 1,213.24/x
  3. Step 3: Cross multiply
    1,485.40x = 2,221.62 × 1,213.24
  4. Step 4: Simplify right side
    1,485.40x = 2,695,358.25
  5. Step 5: Solve for x
    x = 2,695,358.25/1,485.40
  6. Step 6: Final answer
    x = 1,814.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.