Home / 1,421.16-1,960.90-800.04

Finding the Fourth Proportional to 1,421.16, 1,960.90 and 800.04

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Solution

The fourth proportional to 1,421.16, 1,960.90 and 800.04 is: 1,103.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.16 : 1,960.90 = 800.04 : x
  2. Step 2: Convert to fraction form
    1,421.16/1,960.90 = 800.04/x
  3. Step 3: Cross multiply
    1,421.16x = 1,960.90 × 800.04
  4. Step 4: Simplify right side
    1,421.16x = 1,568,798.44
  5. Step 5: Solve for x
    x = 1,568,798.44/1,421.16
  6. Step 6: Final answer
    x = 1,103.89

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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.