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Finding the Fourth Proportional to 1,000.06, 1,380.78 and 801.70

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Solution

The fourth proportional to 1,000.06, 1,380.78 and 801.70 is: 1,106.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,000.06 : 1,380.78 = 801.70 : x
  2. Step 2: Convert to fraction form
    1,000.06/1,380.78 = 801.70/x
  3. Step 3: Cross multiply
    1,000.06x = 1,380.78 × 801.70
  4. Step 4: Simplify right side
    1,000.06x = 1,106,971.33
  5. Step 5: Solve for x
    x = 1,106,971.33/1,000.06
  6. Step 6: Final answer
    x = 1,106.90

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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.