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Finding the Fourth Proportional to 1,000.46, 1,380.41 and 580.57

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Solution

The fourth proportional to 1,000.46, 1,380.41 and 580.57 is: 801.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,000.46 : 1,380.41 = 580.57 : x
  2. Step 2: Convert to fraction form
    1,000.46/1,380.41 = 580.57/x
  3. Step 3: Cross multiply
    1,000.46x = 1,380.41 × 580.57
  4. Step 4: Simplify right side
    1,000.46x = 801,416.28
  5. Step 5: Solve for x
    x = 801,416.28/1,000.46
  6. Step 6: Final answer
    x = 801.05

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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.