Home / 2,779.04-4,166.80-1,390.72

Finding the Fourth Proportional to 2,779.04, 4,166.80 and 1,390.72

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Solution

The fourth proportional to 2,779.04, 4,166.80 and 1,390.72 is: 2,085.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,779.04 : 4,166.80 = 1,390.72 : x
  2. Step 2: Convert to fraction form
    2,779.04/4,166.80 = 1,390.72/x
  3. Step 3: Cross multiply
    2,779.04x = 4,166.80 × 1,390.72
  4. Step 4: Simplify right side
    2,779.04x = 5,794,852.10
  5. Step 5: Solve for x
    x = 5,794,852.10/2,779.04
  6. Step 6: Final answer
    x = 2,085.20

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1.5x scale

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.