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Finding the Fourth Proportional to 701.10, 1,051.58 and 427.12

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Solution

The fourth proportional to 701.10, 1,051.58 and 427.12 is: 640.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    701.10 : 1,051.58 = 427.12 : x
  2. Step 2: Convert to fraction form
    701.10/1,051.58 = 427.12/x
  3. Step 3: Cross multiply
    701.10x = 1,051.58 × 427.12
  4. Step 4: Simplify right side
    701.10x = 449,150.85
  5. Step 5: Solve for x
    x = 449,150.85/701.10
  6. Step 6: Final answer
    x = 640.64

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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.