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Finding the Fourth Proportional to 1,907.80, 2,860.05 and 852.81

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Solution

The fourth proportional to 1,907.80, 2,860.05 and 852.81 is: 1,278.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,907.80 : 2,860.05 = 852.81 : x
  2. Step 2: Convert to fraction form
    1,907.80/2,860.05 = 852.81/x
  3. Step 3: Cross multiply
    1,907.80x = 2,860.05 × 852.81
  4. Step 4: Simplify right side
    1,907.80x = 2,439,074.98
  5. Step 5: Solve for x
    x = 2,439,074.98/1,907.80
  6. Step 6: Final answer
    x = 1,278.48

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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.