Home / 2,214.80-3,056.40-1,220.07

Finding the Fourth Proportional to 2,214.80, 3,056.40 and 1,220.07

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Solution

The fourth proportional to 2,214.80, 3,056.40 and 1,220.07 is: 1,683.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,214.80 : 3,056.40 = 1,220.07 : x
  2. Step 2: Convert to fraction form
    2,214.80/3,056.40 = 1,220.07/x
  3. Step 3: Cross multiply
    2,214.80x = 3,056.40 × 1,220.07
  4. Step 4: Simplify right side
    2,214.80x = 3,729,021.95
  5. Step 5: Solve for x
    x = 3,729,021.95/2,214.80
  6. Step 6: Final answer
    x = 1,683.69

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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.