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Finding the Fourth Proportional to 703.92, 1,055.92 and 694.40

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Solution

The fourth proportional to 703.92, 1,055.92 and 694.40 is: 1,041.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.92 : 1,055.92 = 694.40 : x
  2. Step 2: Convert to fraction form
    703.92/1,055.92 = 694.40/x
  3. Step 3: Cross multiply
    703.92x = 1,055.92 × 694.40
  4. Step 4: Simplify right side
    703.92x = 733,230.85
  5. Step 5: Solve for x
    x = 733,230.85/703.92
  6. Step 6: Final answer
    x = 1,041.64

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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.