Home / 1,779.20-2,454.54-1,115.60

Finding the Fourth Proportional to 1,779.20, 2,454.54 and 1,115.60

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Solution

The fourth proportional to 1,779.20, 2,454.54 and 1,115.60 is: 1,539.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,779.20 : 2,454.54 = 1,115.60 : x
  2. Step 2: Convert to fraction form
    1,779.20/2,454.54 = 1,115.60/x
  3. Step 3: Cross multiply
    1,779.20x = 2,454.54 × 1,115.60
  4. Step 4: Simplify right side
    1,779.20x = 2,738,284.82
  5. Step 5: Solve for x
    x = 2,738,284.82/1,779.20
  6. Step 6: Final answer
    x = 1,539.05

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1.5x scale

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.