Home / 1,779.12-2,668.90-913.64

Finding the Fourth Proportional to 1,779.12, 2,668.90 and 913.64

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Solution

The fourth proportional to 1,779.12, 2,668.90 and 913.64 is: 1,370.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,779.12 : 2,668.90 = 913.64 : x
  2. Step 2: Convert to fraction form
    1,779.12/2,668.90 = 913.64/x
  3. Step 3: Cross multiply
    1,779.12x = 2,668.90 × 913.64
  4. Step 4: Simplify right side
    1,779.12x = 2,438,413.80
  5. Step 5: Solve for x
    x = 2,438,413.80/1,779.12
  6. Step 6: Final answer
    x = 1,370.57

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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.