Home / 1,420.70-2,131.38-804.83

Finding the Fourth Proportional to 1,420.70, 2,131.38 and 804.83

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Solution

The fourth proportional to 1,420.70, 2,131.38 and 804.83 is: 1,207.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420.70 : 2,131.38 = 804.83 : x
  2. Step 2: Convert to fraction form
    1,420.70/2,131.38 = 804.83/x
  3. Step 3: Cross multiply
    1,420.70x = 2,131.38 × 804.83
  4. Step 4: Simplify right side
    1,420.70x = 1,715,387.91
  5. Step 5: Solve for x
    x = 1,715,387.91/1,420.70
  6. Step 6: Final answer
    x = 1,207.43

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1.5x scale

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.