Home / 3,107.76-4,287.36-1,781.16

Finding the Fourth Proportional to 3,107.76, 4,287.36 and 1,781.16

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Solution

The fourth proportional to 3,107.76, 4,287.36 and 1,781.16 is: 2,457.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,107.76 : 4,287.36 = 1,781.16 : x
  2. Step 2: Convert to fraction form
    3,107.76/4,287.36 = 1,781.16/x
  3. Step 3: Cross multiply
    3,107.76x = 4,287.36 × 1,781.16
  4. Step 4: Simplify right side
    3,107.76x = 7,636,474.14
  5. Step 5: Solve for x
    x = 7,636,474.14/3,107.76
  6. Step 6: Final answer
    x = 2,457.23

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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.