Home / 800,085.60-1,200,128.40-351,021.60

Finding the Fourth Proportional to 800,085.60, 1,200,128.40 and 351,021.60

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Solution

The fourth proportional to 800,085.60, 1,200,128.40 and 351,021.60 is: 526,532.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    800,085.60 : 1,200,128.40 = 351,021.60 : x
  2. Step 2: Convert to fraction form
    800,085.60/1,200,128.40 = 351,021.60/x
  3. Step 3: Cross multiply
    800,085.60x = 1,200,128.40 × 351,021.60
  4. Step 4: Simplify right side
    800,085.60x = 421,270,991,173.44
  5. Step 5: Solve for x
    x = 421,270,991,173.44/800,085.60
  6. Step 6: Final answer
    x = 526,532.40

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Double scale
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Similar ratio
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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.