Home / 3,130.55-4,321.24-1,804.78

Finding the Fourth Proportional to 3,130.55, 4,321.24 and 1,804.78

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Solution

The fourth proportional to 3,130.55, 4,321.24 and 1,804.78 is: 2,491.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,130.55 : 4,321.24 = 1,804.78 : x
  2. Step 2: Convert to fraction form
    3,130.55/4,321.24 = 1,804.78/x
  3. Step 3: Cross multiply
    3,130.55x = 4,321.24 × 1,804.78
  4. Step 4: Simplify right side
    3,130.55x = 7,798,872.21
  5. Step 5: Solve for x
    x = 7,798,872.21/3,130.55
  6. Step 6: Final answer
    x = 2,491.22

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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.