Home / 2,765.16-4,148.64-1,120.80

Finding the Fourth Proportional to 2,765.16, 4,148.64 and 1,120.80

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Solution

The fourth proportional to 2,765.16, 4,148.64 and 1,120.80 is: 1,681.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,765.16 : 4,148.64 = 1,120.80 : x
  2. Step 2: Convert to fraction form
    2,765.16/4,148.64 = 1,120.80/x
  3. Step 3: Cross multiply
    2,765.16x = 4,148.64 × 1,120.80
  4. Step 4: Simplify right side
    2,765.16x = 4,649,795.71
  5. Step 5: Solve for x
    x = 4,649,795.71/2,765.16
  6. Step 6: Final answer
    x = 1,681.56

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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.