Home / 1,421.00-2,127.94-899.43

Finding the Fourth Proportional to 1,421.00, 2,127.94 and 899.43

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Solution

The fourth proportional to 1,421.00, 2,127.94 and 899.43 is: 1,346.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.00 : 2,127.94 = 899.43 : x
  2. Step 2: Convert to fraction form
    1,421.00/2,127.94 = 899.43/x
  3. Step 3: Cross multiply
    1,421.00x = 2,127.94 × 899.43
  4. Step 4: Simplify right side
    1,421.00x = 1,913,922.85
  5. Step 5: Solve for x
    x = 1,913,922.85/1,421.00
  6. Step 6: Final answer
    x = 1,346.89

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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.