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Finding the Fourth Proportional to 1,907.87, 2,860.07 and 867.32

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Solution

The fourth proportional to 1,907.87, 2,860.07 and 867.32 is: 1,300.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,907.87 : 2,860.07 = 867.32 : x
  2. Step 2: Convert to fraction form
    1,907.87/2,860.07 = 867.32/x
  3. Step 3: Cross multiply
    1,907.87x = 2,860.07 × 867.32
  4. Step 4: Simplify right side
    1,907.87x = 2,480,577.28
  5. Step 5: Solve for x
    x = 2,480,577.28/1,907.87
  6. Step 6: Final answer
    x = 1,300.18

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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.