Home / 2,971.20-4,099.96-1,907.08

Finding the Fourth Proportional to 2,971.20, 4,099.96 and 1,907.08

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Solution

The fourth proportional to 2,971.20, 4,099.96 and 1,907.08 is: 2,631.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,971.20 : 4,099.96 = 1,907.08 : x
  2. Step 2: Convert to fraction form
    2,971.20/4,099.96 = 1,907.08/x
  3. Step 3: Cross multiply
    2,971.20x = 4,099.96 × 1,907.08
  4. Step 4: Simplify right side
    2,971.20x = 7,818,951.72
  5. Step 5: Solve for x
    x = 7,818,951.72/2,971.20
  6. Step 6: Final answer
    x = 2,631.58

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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.