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Finding the Fourth Proportional to 4,719.02, 7,078.49 and 1,209.02

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Solution

The fourth proportional to 4,719.02, 7,078.49 and 1,209.02 is: 1,813.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,719.02 : 7,078.49 = 1,209.02 : x
  2. Step 2: Convert to fraction form
    4,719.02/7,078.49 = 1,209.02/x
  3. Step 3: Cross multiply
    4,719.02x = 7,078.49 × 1,209.02
  4. Step 4: Simplify right side
    4,719.02x = 8,557,994.54
  5. Step 5: Solve for x
    x = 8,557,994.54/4,719.02
  6. Step 6: Final answer
    x = 1,813.51

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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.