Home / 1,727.99-2,590.57-687.55

Finding the Fourth Proportional to 1,727.99, 2,590.57 and 687.55

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Solution

The fourth proportional to 1,727.99, 2,590.57 and 687.55 is: 1,030.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,727.99 : 2,590.57 = 687.55 : x
  2. Step 2: Convert to fraction form
    1,727.99/2,590.57 = 687.55/x
  3. Step 3: Cross multiply
    1,727.99x = 2,590.57 × 687.55
  4. Step 4: Simplify right side
    1,727.99x = 1,781,130.01
  5. Step 5: Solve for x
    x = 1,781,130.01/1,727.99
  6. Step 6: Final answer
    x = 1,030.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.