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Finding the Fourth Proportional to 1,333.54, 1,999.64 and 778.44

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Solution

The fourth proportional to 1,333.54, 1,999.64 and 778.44 is: 1,167.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,333.54 : 1,999.64 = 778.44 : x
  2. Step 2: Convert to fraction form
    1,333.54/1,999.64 = 778.44/x
  3. Step 3: Cross multiply
    1,333.54x = 1,999.64 × 778.44
  4. Step 4: Simplify right side
    1,333.54x = 1,556,599.76
  5. Step 5: Solve for x
    x = 1,556,599.76/1,333.54
  6. Step 6: Final answer
    x = 1,167.27

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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.