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Finding the Fourth Proportional to 1,087.62, 1,629.38 and 539.51

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Solution

The fourth proportional to 1,087.62, 1,629.38 and 539.51 is: 808.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.62 : 1,629.38 = 539.51 : x
  2. Step 2: Convert to fraction form
    1,087.62/1,629.38 = 539.51/x
  3. Step 3: Cross multiply
    1,087.62x = 1,629.38 × 539.51
  4. Step 4: Simplify right side
    1,087.62x = 879,055.96
  5. Step 5: Solve for x
    x = 879,055.96/1,087.62
  6. Step 6: Final answer
    x = 808.24

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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.