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Finding the Fourth Proportional to 1,571.85, 2,169.09 and 908.73

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Solution

The fourth proportional to 1,571.85, 2,169.09 and 908.73 is: 1,254.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,571.85 : 2,169.09 = 908.73 : x
  2. Step 2: Convert to fraction form
    1,571.85/2,169.09 = 908.73/x
  3. Step 3: Cross multiply
    1,571.85x = 2,169.09 × 908.73
  4. Step 4: Simplify right side
    1,571.85x = 1,971,117.16
  5. Step 5: Solve for x
    x = 1,971,117.16/1,571.85
  6. Step 6: Final answer
    x = 1,254.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.