Home / 3,211.60-4,430.20-1,885.05

Finding the Fourth Proportional to 3,211.60, 4,430.20 and 1,885.05

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Solution

The fourth proportional to 3,211.60, 4,430.20 and 1,885.05 is: 2,600.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,211.60 : 4,430.20 = 1,885.05 : x
  2. Step 2: Convert to fraction form
    3,211.60/4,430.20 = 1,885.05/x
  3. Step 3: Cross multiply
    3,211.60x = 4,430.20 × 1,885.05
  4. Step 4: Simplify right side
    3,211.60x = 8,351,139.08
  5. Step 5: Solve for x
    x = 8,351,139.08/3,211.60
  6. Step 6: Final answer
    x = 2,600.30

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Half scale
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Double scale
Find fourth proportional to 3,212.60, 4,431.57 and 1,886.05
Similar ratio
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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.