Home / 2,780.54-4,172.50-1,319.84

Finding the Fourth Proportional to 2,780.54, 4,172.50 and 1,319.84

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Solution

The fourth proportional to 2,780.54, 4,172.50 and 1,319.84 is: 1,980.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.54 : 4,172.50 = 1,319.84 : x
  2. Step 2: Convert to fraction form
    2,780.54/4,172.50 = 1,319.84/x
  3. Step 3: Cross multiply
    2,780.54x = 4,172.50 × 1,319.84
  4. Step 4: Simplify right side
    2,780.54x = 5,507,032.40
  5. Step 5: Solve for x
    x = 5,507,032.40/2,780.54
  6. Step 6: Final answer
    x = 1,980.56

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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.