Home / 2,878-3,972.36-1,636.72

Finding the Fourth Proportional to 2,878, 3,972.36 and 1,636.72

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Solution

The fourth proportional to 2,878, 3,972.36 and 1,636.72 is: 2,259.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,878 : 3,972.36 = 1,636.72 : x
  2. Step 2: Convert to fraction form
    2,878/3,972.36 = 1,636.72/x
  3. Step 3: Cross multiply
    2,878x = 3,972.36 × 1,636.72
  4. Step 4: Simplify right side
    2,878x = 6,501,641.06
  5. Step 5: Solve for x
    x = 6,501,641.06/2,878
  6. Step 6: Final answer
    x = 2,259.08

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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.