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Finding the Fourth Proportional to 4,676.94, 7,015.78 and 1,390.03

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Solution

The fourth proportional to 4,676.94, 7,015.78 and 1,390.03 is: 2,085.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,676.94 : 7,015.78 = 1,390.03 : x
  2. Step 2: Convert to fraction form
    4,676.94/7,015.78 = 1,390.03/x
  3. Step 3: Cross multiply
    4,676.94x = 7,015.78 × 1,390.03
  4. Step 4: Simplify right side
    4,676.94x = 9,752,155.18
  5. Step 5: Solve for x
    x = 9,752,155.18/4,676.94
  6. Step 6: Final answer
    x = 2,085.16

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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.