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Finding the Fourth Proportional to 701.92, 1,051.44 and 693.28

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Solution

The fourth proportional to 701.92, 1,051.44 and 693.28 is: 1,038.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    701.92 : 1,051.44 = 693.28 : x
  2. Step 2: Convert to fraction form
    701.92/1,051.44 = 693.28/x
  3. Step 3: Cross multiply
    701.92x = 1,051.44 × 693.28
  4. Step 4: Simplify right side
    701.92x = 728,942.32
  5. Step 5: Solve for x
    x = 728,942.32/701.92
  6. Step 6: Final answer
    x = 1,038.50

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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.