Home / 3,107.13-4,287.80-1,780.79

Finding the Fourth Proportional to 3,107.13, 4,287.80 and 1,780.79

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Solution

The fourth proportional to 3,107.13, 4,287.80 and 1,780.79 is: 2,457.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,107.13 : 4,287.80 = 1,780.79 : x
  2. Step 2: Convert to fraction form
    3,107.13/4,287.80 = 1,780.79/x
  3. Step 3: Cross multiply
    3,107.13x = 4,287.80 × 1,780.79
  4. Step 4: Simplify right side
    3,107.13x = 7,635,654.37
  5. Step 5: Solve for x
    x = 7,635,654.37/3,107.13
  6. Step 6: Final answer
    x = 2,457.47

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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.