Home / 2,666.08-3,999.12-1,128.16

Finding the Fourth Proportional to 2,666.08, 3,999.12 and 1,128.16

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Solution

The fourth proportional to 2,666.08, 3,999.12 and 1,128.16 is: 1,692.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,666.08 : 3,999.12 = 1,128.16 : x
  2. Step 2: Convert to fraction form
    2,666.08/3,999.12 = 1,128.16/x
  3. Step 3: Cross multiply
    2,666.08x = 3,999.12 × 1,128.16
  4. Step 4: Simplify right side
    2,666.08x = 4,511,647.22
  5. Step 5: Solve for x
    x = 4,511,647.22/2,666.08
  6. Step 6: Final answer
    x = 1,692.24

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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.