Home / 1,415.19-2,120.73-1,005.12

Finding the Fourth Proportional to 1,415.19, 2,120.73 and 1,005.12

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Solution

The fourth proportional to 1,415.19, 2,120.73 and 1,005.12 is: 1,506.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,415.19 : 2,120.73 = 1,005.12 : x
  2. Step 2: Convert to fraction form
    1,415.19/2,120.73 = 1,005.12/x
  3. Step 3: Cross multiply
    1,415.19x = 2,120.73 × 1,005.12
  4. Step 4: Simplify right side
    1,415.19x = 2,131,588.14
  5. Step 5: Solve for x
    x = 2,131,588.14/1,415.19
  6. Step 6: Final answer
    x = 1,506.22

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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.