Home / 2,767.30-4,128.64-2,666.45

Finding the Fourth Proportional to 2,767.30, 4,128.64 and 2,666.45

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Solution

The fourth proportional to 2,767.30, 4,128.64 and 2,666.45 is: 3,978.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,767.30 : 4,128.64 = 2,666.45 : x
  2. Step 2: Convert to fraction form
    2,767.30/4,128.64 = 2,666.45/x
  3. Step 3: Cross multiply
    2,767.30x = 4,128.64 × 2,666.45
  4. Step 4: Simplify right side
    2,767.30x = 11,008,815.78
  5. Step 5: Solve for x
    x = 11,008,815.78/2,767.30
  6. Step 6: Final answer
    x = 3,978.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.