Home / 2,890.08-3,987.77-1,771.20

Finding the Fourth Proportional to 2,890.08, 3,987.77 and 1,771.20

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Solution

The fourth proportional to 2,890.08, 3,987.77 and 1,771.20 is: 2,443.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,890.08 : 3,987.77 = 1,771.20 : x
  2. Step 2: Convert to fraction form
    2,890.08/3,987.77 = 1,771.20/x
  3. Step 3: Cross multiply
    2,890.08x = 3,987.77 × 1,771.20
  4. Step 4: Simplify right side
    2,890.08x = 7,063,129.37
  5. Step 5: Solve for x
    x = 7,063,129.37/2,890.08
  6. Step 6: Final answer
    x = 2,443.92

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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.