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Finding the Fourth Proportional to 2,768.80, 4,148.40 and 1,794.40

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Solution

The fourth proportional to 2,768.80, 4,148.40 and 1,794.40 is: 2,688.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,768.80 : 4,148.40 = 1,794.40 : x
  2. Step 2: Convert to fraction form
    2,768.80/4,148.40 = 1,794.40/x
  3. Step 3: Cross multiply
    2,768.80x = 4,148.40 × 1,794.40
  4. Step 4: Simplify right side
    2,768.80x = 7,443,888.96
  5. Step 5: Solve for x
    x = 7,443,888.96/2,768.80
  6. Step 6: Final answer
    x = 2,688.49

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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.