Home / 1,210.60-1,664.14-1,091.80

Finding the Fourth Proportional to 1,210.60, 1,664.14 and 1,091.80

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Solution

The fourth proportional to 1,210.60, 1,664.14 and 1,091.80 is: 1,500.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.60 : 1,664.14 = 1,091.80 : x
  2. Step 2: Convert to fraction form
    1,210.60/1,664.14 = 1,091.80/x
  3. Step 3: Cross multiply
    1,210.60x = 1,664.14 × 1,091.80
  4. Step 4: Simplify right side
    1,210.60x = 1,816,908.05
  5. Step 5: Solve for x
    x = 1,816,908.05/1,210.60
  6. Step 6: Final answer
    x = 1,500.83

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.