Home / 3,130.43-4,319.78-1,804.23

Finding the Fourth Proportional to 3,130.43, 4,319.78 and 1,804.23

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Solution

The fourth proportional to 3,130.43, 4,319.78 and 1,804.23 is: 2,489.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,130.43 : 4,319.78 = 1,804.23 : x
  2. Step 2: Convert to fraction form
    3,130.43/4,319.78 = 1,804.23/x
  3. Step 3: Cross multiply
    3,130.43x = 4,319.78 × 1,804.23
  4. Step 4: Simplify right side
    3,130.43x = 7,793,867.65
  5. Step 5: Solve for x
    x = 7,793,867.65/3,130.43
  6. Step 6: Final answer
    x = 2,489.72

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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.