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Finding the Fourth Proportional to 2,109.01, 3,160.75 and 874.95

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Solution

The fourth proportional to 2,109.01, 3,160.75 and 874.95 is: 1,311.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,109.01 : 3,160.75 = 874.95 : x
  2. Step 2: Convert to fraction form
    2,109.01/3,160.75 = 874.95/x
  3. Step 3: Cross multiply
    2,109.01x = 3,160.75 × 874.95
  4. Step 4: Simplify right side
    2,109.01x = 2,765,501.13
  5. Step 5: Solve for x
    x = 2,765,501.13/2,109.01
  6. Step 6: Final answer
    x = 1,311.28

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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.