Home / 2,678.40-4,012.56-1,520.64

Finding the Fourth Proportional to 2,678.40, 4,012.56 and 1,520.64

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Solution

The fourth proportional to 2,678.40, 4,012.56 and 1,520.64 is: 2,278.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,678.40 : 4,012.56 = 1,520.64 : x
  2. Step 2: Convert to fraction form
    2,678.40/4,012.56 = 1,520.64/x
  3. Step 3: Cross multiply
    2,678.40x = 4,012.56 × 1,520.64
  4. Step 4: Simplify right side
    2,678.40x = 6,101,659.24
  5. Step 5: Solve for x
    x = 6,101,659.24/2,678.40
  6. Step 6: Final answer
    x = 2,278.10

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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.