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Finding the Fourth Proportional to 703.92, 1,056.40 and 698.56

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Solution

The fourth proportional to 703.92, 1,056.40 and 698.56 is: 1,048.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.92 : 1,056.40 = 698.56 : x
  2. Step 2: Convert to fraction form
    703.92/1,056.40 = 698.56/x
  3. Step 3: Cross multiply
    703.92x = 1,056.40 × 698.56
  4. Step 4: Simplify right side
    703.92x = 737,958.78
  5. Step 5: Solve for x
    x = 737,958.78/703.92
  6. Step 6: Final answer
    x = 1,048.36

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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.