Home / 1,421.11-1,961.88-1,002.73

Finding the Fourth Proportional to 1,421.11, 1,961.88 and 1,002.73

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Solution

The fourth proportional to 1,421.11, 1,961.88 and 1,002.73 is: 1,384.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.11 : 1,961.88 = 1,002.73 : x
  2. Step 2: Convert to fraction form
    1,421.11/1,961.88 = 1,002.73/x
  3. Step 3: Cross multiply
    1,421.11x = 1,961.88 × 1,002.73
  4. Step 4: Simplify right side
    1,421.11x = 1,967,235.93
  5. Step 5: Solve for x
    x = 1,967,235.93/1,421.11
  6. Step 6: Final answer
    x = 1,384.30

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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.