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Finding the Fourth Proportional to 2,571.81, 3,549.11 and 1,392.89

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Solution

The fourth proportional to 2,571.81, 3,549.11 and 1,392.89 is: 1,922.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,571.81 : 3,549.11 = 1,392.89 : x
  2. Step 2: Convert to fraction form
    2,571.81/3,549.11 = 1,392.89/x
  3. Step 3: Cross multiply
    2,571.81x = 3,549.11 × 1,392.89
  4. Step 4: Simplify right side
    2,571.81x = 4,943,495.12
  5. Step 5: Solve for x
    x = 4,943,495.12/2,571.81
  6. Step 6: Final answer
    x = 1,922.19

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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.