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Finding the Fourth Proportional to 2,571.59, 3,857.33 and 840.21

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Solution

The fourth proportional to 2,571.59, 3,857.33 and 840.21 is: 1,260.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,571.59 : 3,857.33 = 840.21 : x
  2. Step 2: Convert to fraction form
    2,571.59/3,857.33 = 840.21/x
  3. Step 3: Cross multiply
    2,571.59x = 3,857.33 × 840.21
  4. Step 4: Simplify right side
    2,571.59x = 3,240,967.24
  5. Step 5: Solve for x
    x = 3,240,967.24/2,571.59
  6. Step 6: Final answer
    x = 1,260.30

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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.