Home / 1,686.08-2,529.57-905.75

Finding the Fourth Proportional to 1,686.08, 2,529.57 and 905.75

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Solution

The fourth proportional to 1,686.08, 2,529.57 and 905.75 is: 1,358.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,686.08 : 2,529.57 = 905.75 : x
  2. Step 2: Convert to fraction form
    1,686.08/2,529.57 = 905.75/x
  3. Step 3: Cross multiply
    1,686.08x = 2,529.57 × 905.75
  4. Step 4: Simplify right side
    1,686.08x = 2,291,158.26
  5. Step 5: Solve for x
    x = 2,291,158.26/1,686.08
  6. Step 6: Final answer
    x = 1,358.86

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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.