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Finding the Fourth Proportional to 2,673.60, 4,007.16 and 1,211.28

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Solution

The fourth proportional to 2,673.60, 4,007.16 and 1,211.28 is: 1,815.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,673.60 : 4,007.16 = 1,211.28 : x
  2. Step 2: Convert to fraction form
    2,673.60/4,007.16 = 1,211.28/x
  3. Step 3: Cross multiply
    2,673.60x = 4,007.16 × 1,211.28
  4. Step 4: Simplify right side
    2,673.60x = 4,853,792.76
  5. Step 5: Solve for x
    x = 4,853,792.76/2,673.60
  6. Step 6: Final answer
    x = 1,815.45

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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.