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Finding the Fourth Proportional to 704.50, 1,056.90 and 574.18

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Solution

The fourth proportional to 704.50, 1,056.90 and 574.18 is: 861.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.50 : 1,056.90 = 574.18 : x
  2. Step 2: Convert to fraction form
    704.50/1,056.90 = 574.18/x
  3. Step 3: Cross multiply
    704.50x = 1,056.90 × 574.18
  4. Step 4: Simplify right side
    704.50x = 606,850.84
  5. Step 5: Solve for x
    x = 606,850.84/704.50
  6. Step 6: Final answer
    x = 861.39

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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.