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Finding the Fourth Proportional to 1,907.42, 2,861.40 and 867.42

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Solution

The fourth proportional to 1,907.42, 2,861.40 and 867.42 is: 1,301.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,907.42 : 2,861.40 = 867.42 : x
  2. Step 2: Convert to fraction form
    1,907.42/2,861.40 = 867.42/x
  3. Step 3: Cross multiply
    1,907.42x = 2,861.40 × 867.42
  4. Step 4: Simplify right side
    1,907.42x = 2,482,035.59
  5. Step 5: Solve for x
    x = 2,482,035.59/1,907.42
  6. Step 6: Final answer
    x = 1,301.25

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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.