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Finding the Fourth Proportional to 2,907.92, 4,014.24 and 1,913.72

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Solution

The fourth proportional to 2,907.92, 4,014.24 and 1,913.72 is: 2,641.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,907.92 : 4,014.24 = 1,913.72 : x
  2. Step 2: Convert to fraction form
    2,907.92/4,014.24 = 1,913.72/x
  3. Step 3: Cross multiply
    2,907.92x = 4,014.24 × 1,913.72
  4. Step 4: Simplify right side
    2,907.92x = 7,682,131.37
  5. Step 5: Solve for x
    x = 7,682,131.37/2,907.92
  6. Step 6: Final answer
    x = 2,641.80

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1.5x scale

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.