Home / 2,109.16-2,911.62-1,224.64

Finding the Fourth Proportional to 2,109.16, 2,911.62 and 1,224.64

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Solution

The fourth proportional to 2,109.16, 2,911.62 and 1,224.64 is: 1,690.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,109.16 : 2,911.62 = 1,224.64 : x
  2. Step 2: Convert to fraction form
    2,109.16/2,911.62 = 1,224.64/x
  3. Step 3: Cross multiply
    2,109.16x = 2,911.62 × 1,224.64
  4. Step 4: Simplify right side
    2,109.16x = 3,565,686.32
  5. Step 5: Solve for x
    x = 3,565,686.32/2,109.16
  6. Step 6: Final answer
    x = 1,690.57

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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.