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Finding the Fourth Proportional to 704.22, 1,056.69 and 513.42

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Solution

The fourth proportional to 704.22, 1,056.69 and 513.42 is: 770.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.22 : 1,056.69 = 513.42 : x
  2. Step 2: Convert to fraction form
    704.22/1,056.69 = 513.42/x
  3. Step 3: Cross multiply
    704.22x = 1,056.69 × 513.42
  4. Step 4: Simplify right side
    704.22x = 542,525.78
  5. Step 5: Solve for x
    x = 542,525.78/704.22
  6. Step 6: Final answer
    x = 770.39

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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.