Home / 1,145.62-1,720.31-1,087.19

Finding the Fourth Proportional to 1,145.62, 1,720.31 and 1,087.19

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Solution

The fourth proportional to 1,145.62, 1,720.31 and 1,087.19 is: 1,632.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,145.62 : 1,720.31 = 1,087.19 : x
  2. Step 2: Convert to fraction form
    1,145.62/1,720.31 = 1,087.19/x
  3. Step 3: Cross multiply
    1,145.62x = 1,720.31 × 1,087.19
  4. Step 4: Simplify right side
    1,145.62x = 1,870,302.36
  5. Step 5: Solve for x
    x = 1,870,302.36/1,145.62
  6. Step 6: Final answer
    x = 1,632.57

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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.