Home / 2,718.24-4,076.80-770.40

Finding the Fourth Proportional to 2,718.24, 4,076.80 and 770.40

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Solution

The fourth proportional to 2,718.24, 4,076.80 and 770.40 is: 1,155.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,718.24 : 4,076.80 = 770.40 : x
  2. Step 2: Convert to fraction form
    2,718.24/4,076.80 = 770.40/x
  3. Step 3: Cross multiply
    2,718.24x = 4,076.80 × 770.40
  4. Step 4: Simplify right side
    2,718.24x = 3,140,766.72
  5. Step 5: Solve for x
    x = 3,140,766.72/2,718.24
  6. Step 6: Final answer
    x = 1,155.44

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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.