Home / 1,528.15-2,108.66-855.99

Finding the Fourth Proportional to 1,528.15, 2,108.66 and 855.99

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Solution

The fourth proportional to 1,528.15, 2,108.66 and 855.99 is: 1,181.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,528.15 : 2,108.66 = 855.99 : x
  2. Step 2: Convert to fraction form
    1,528.15/2,108.66 = 855.99/x
  3. Step 3: Cross multiply
    1,528.15x = 2,108.66 × 855.99
  4. Step 4: Simplify right side
    1,528.15x = 1,804,991.87
  5. Step 5: Solve for x
    x = 1,804,991.87/1,528.15
  6. Step 6: Final answer
    x = 1,181.17

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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.