Home / 3,890.40-5,370.48-2,319.04

Finding the Fourth Proportional to 3,890.40, 5,370.48 and 2,319.04

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Solution

The fourth proportional to 3,890.40, 5,370.48 and 2,319.04 is: 3,201.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.40 : 5,370.48 = 2,319.04 : x
  2. Step 2: Convert to fraction form
    3,890.40/5,370.48 = 2,319.04/x
  3. Step 3: Cross multiply
    3,890.40x = 5,370.48 × 2,319.04
  4. Step 4: Simplify right side
    3,890.40x = 12,454,357.94
  5. Step 5: Solve for x
    x = 12,454,357.94/3,890.40
  6. Step 6: Final answer
    x = 3,201.31

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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.