Home / 1,779.90-2,451.02-1,219.79

Finding the Fourth Proportional to 1,779.90, 2,451.02 and 1,219.79

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Solution

The fourth proportional to 1,779.90, 2,451.02 and 1,219.79 is: 1,679.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,779.90 : 2,451.02 = 1,219.79 : x
  2. Step 2: Convert to fraction form
    1,779.90/2,451.02 = 1,219.79/x
  3. Step 3: Cross multiply
    1,779.90x = 2,451.02 × 1,219.79
  4. Step 4: Simplify right side
    1,779.90x = 2,989,711.33
  5. Step 5: Solve for x
    x = 2,989,711.33/1,779.90
  6. Step 6: Final answer
    x = 1,679.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.