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Finding the Fourth Proportional to 1,000.00, 1,379.84 and 580.37

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Solution

The fourth proportional to 1,000.00, 1,379.84 and 580.37 is: 800.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,000.00 : 1,379.84 = 580.37 : x
  2. Step 2: Convert to fraction form
    1,000.00/1,379.84 = 580.37/x
  3. Step 3: Cross multiply
    1,000.00x = 1,379.84 × 580.37
  4. Step 4: Simplify right side
    1,000.00x = 800,807.94
  5. Step 5: Solve for x
    x = 800,807.94/1,000.00
  6. Step 6: Final answer
    x = 800.81

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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.