Home / 2,147.08-3,220.68-912.77

Finding the Fourth Proportional to 2,147.08, 3,220.68 and 912.77

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Solution

The fourth proportional to 2,147.08, 3,220.68 and 912.77 is: 1,369.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,147.08 : 3,220.68 = 912.77 : x
  2. Step 2: Convert to fraction form
    2,147.08/3,220.68 = 912.77/x
  3. Step 3: Cross multiply
    2,147.08x = 3,220.68 × 912.77
  4. Step 4: Simplify right side
    2,147.08x = 2,939,740.08
  5. Step 5: Solve for x
    x = 2,939,740.08/2,147.08
  6. Step 6: Final answer
    x = 1,369.18

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Double scale
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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.