Home / 3,211.60-4,430.28-2,215.12

Finding the Fourth Proportional to 3,211.60, 4,430.28 and 2,215.12

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Solution

The fourth proportional to 3,211.60, 4,430.28 and 2,215.12 is: 3,055.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,211.60 : 4,430.28 = 2,215.12 : x
  2. Step 2: Convert to fraction form
    3,211.60/4,430.28 = 2,215.12/x
  3. Step 3: Cross multiply
    3,211.60x = 4,430.28 × 2,215.12
  4. Step 4: Simplify right side
    3,211.60x = 9,813,601.83
  5. Step 5: Solve for x
    x = 9,813,601.83/3,211.60
  6. Step 6: Final answer
    x = 3,055.67

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Half scale
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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.