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Finding the Fourth Proportional to 1,907.21, 2,858.30 and 810.21

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Solution

The fourth proportional to 1,907.21, 2,858.30 and 810.21 is: 1,214.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,907.21 : 2,858.30 = 810.21 : x
  2. Step 2: Convert to fraction form
    1,907.21/2,858.30 = 810.21/x
  3. Step 3: Cross multiply
    1,907.21x = 2,858.30 × 810.21
  4. Step 4: Simplify right side
    1,907.21x = 2,315,819.19
  5. Step 5: Solve for x
    x = 2,315,819.19/1,907.21
  6. Step 6: Final answer
    x = 1,214.25

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1.5x scale

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.