Home / 3,107.56-4,287.88-1,781.32

Finding the Fourth Proportional to 3,107.56, 4,287.88 and 1,781.32

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Solution

The fourth proportional to 3,107.56, 4,287.88 and 1,781.32 is: 2,457.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,107.56 : 4,287.88 = 1,781.32 : x
  2. Step 2: Convert to fraction form
    3,107.56/4,287.88 = 1,781.32/x
  3. Step 3: Cross multiply
    3,107.56x = 4,287.88 × 1,781.32
  4. Step 4: Simplify right side
    3,107.56x = 7,638,086.40
  5. Step 5: Solve for x
    x = 7,638,086.40/3,107.56
  6. Step 6: Final answer
    x = 2,457.90

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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.