Home / 1,817.79-2,509.49-1,287.09

Finding the Fourth Proportional to 1,817.79, 2,509.49 and 1,287.09

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Solution

The fourth proportional to 1,817.79, 2,509.49 and 1,287.09 is: 1,776.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,817.79 : 2,509.49 = 1,287.09 : x
  2. Step 2: Convert to fraction form
    1,817.79/2,509.49 = 1,287.09/x
  3. Step 3: Cross multiply
    1,817.79x = 2,509.49 × 1,287.09
  4. Step 4: Simplify right side
    1,817.79x = 3,229,933.05
  5. Step 5: Solve for x
    x = 3,229,933.05/1,817.79
  6. Step 6: Final answer
    x = 1,776.85

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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.