Home / 2,220.36-3,064.14-1,289.40

Finding the Fourth Proportional to 2,220.36, 3,064.14 and 1,289.40

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Solution

The fourth proportional to 2,220.36, 3,064.14 and 1,289.40 is: 1,779.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,220.36 : 3,064.14 = 1,289.40 : x
  2. Step 2: Convert to fraction form
    2,220.36/3,064.14 = 1,289.40/x
  3. Step 3: Cross multiply
    2,220.36x = 3,064.14 × 1,289.40
  4. Step 4: Simplify right side
    2,220.36x = 3,950,902.12
  5. Step 5: Solve for x
    x = 3,950,902.12/2,220.36
  6. Step 6: Final answer
    x = 1,779.40

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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.