Home / 1,210.60-1,659.74-1,188.73

Finding the Fourth Proportional to 1,210.60, 1,659.74 and 1,188.73

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Solution

The fourth proportional to 1,210.60, 1,659.74 and 1,188.73 is: 1,629.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.60 : 1,659.74 = 1,188.73 : x
  2. Step 2: Convert to fraction form
    1,210.60/1,659.74 = 1,188.73/x
  3. Step 3: Cross multiply
    1,210.60x = 1,659.74 × 1,188.73
  4. Step 4: Simplify right side
    1,210.60x = 1,972,981.55
  5. Step 5: Solve for x
    x = 1,972,981.55/1,210.60
  6. Step 6: Final answer
    x = 1,629.76

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Half scale
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Double scale
Find fourth proportional to 1,211.60, 1,661.11 and 1,189.73
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1.5x scale

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.