Home / 4,211.19-6,310.85-1,987.65

Finding the Fourth Proportional to 4,211.19, 6,310.85 and 1,987.65

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Solution

The fourth proportional to 4,211.19, 6,310.85 and 1,987.65 is: 2,978.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,211.19 : 6,310.85 = 1,987.65 : x
  2. Step 2: Convert to fraction form
    4,211.19/6,310.85 = 1,987.65/x
  3. Step 3: Cross multiply
    4,211.19x = 6,310.85 × 1,987.65
  4. Step 4: Simplify right side
    4,211.19x = 12,543,751.06
  5. Step 5: Solve for x
    x = 12,543,751.06/4,211.19
  6. Step 6: Final answer
    x = 2,978.67

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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.