Home / 1,415.04-2,120.32-1,091.20

Finding the Fourth Proportional to 1,415.04, 2,120.32 and 1,091.20

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Solution

The fourth proportional to 1,415.04, 2,120.32 and 1,091.20 is: 1,635.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,415.04 : 2,120.32 = 1,091.20 : x
  2. Step 2: Convert to fraction form
    1,415.04/2,120.32 = 1,091.20/x
  3. Step 3: Cross multiply
    1,415.04x = 2,120.32 × 1,091.20
  4. Step 4: Simplify right side
    1,415.04x = 2,313,693.18
  5. Step 5: Solve for x
    x = 2,313,693.18/1,415.04
  6. Step 6: Final answer
    x = 1,635.07

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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.