Home / 1,779.12-2,455.12-1,116.32

Finding the Fourth Proportional to 1,779.12, 2,455.12 and 1,116.32

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Solution

The fourth proportional to 1,779.12, 2,455.12 and 1,116.32 is: 1,540.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,779.12 : 2,455.12 = 1,116.32 : x
  2. Step 2: Convert to fraction form
    1,779.12/2,455.12 = 1,116.32/x
  3. Step 3: Cross multiply
    1,779.12x = 2,455.12 × 1,116.32
  4. Step 4: Simplify right side
    1,779.12x = 2,740,699.56
  5. Step 5: Solve for x
    x = 2,740,699.56/1,779.12
  6. Step 6: Final answer
    x = 1,540.48

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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.