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Finding the Fourth Proportional to 1,421.75, 2,131.11 and 599.00

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Solution

The fourth proportional to 1,421.75, 2,131.11 and 599.00 is: 897.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.75 : 2,131.11 = 599.00 : x
  2. Step 2: Convert to fraction form
    1,421.75/2,131.11 = 599.00/x
  3. Step 3: Cross multiply
    1,421.75x = 2,131.11 × 599.00
  4. Step 4: Simplify right side
    1,421.75x = 1,276,524.23
  5. Step 5: Solve for x
    x = 1,276,524.23/1,421.75
  6. Step 6: Final answer
    x = 897.85

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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.