Home / 3,130.38-4,319.78-1,804.32

Finding the Fourth Proportional to 3,130.38, 4,319.78 and 1,804.32

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Solution

The fourth proportional to 3,130.38, 4,319.78 and 1,804.32 is: 2,489.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,130.38 : 4,319.78 = 1,804.32 : x
  2. Step 2: Convert to fraction form
    3,130.38/4,319.78 = 1,804.32/x
  3. Step 3: Cross multiply
    3,130.38x = 4,319.78 × 1,804.32
  4. Step 4: Simplify right side
    3,130.38x = 7,794,265.45
  5. Step 5: Solve for x
    x = 7,794,265.45/3,130.38
  6. Step 6: Final answer
    x = 2,489.88

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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.