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Finding the Fourth Proportional to 704.23, 1,054.22 and 639.23

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Solution

The fourth proportional to 704.23, 1,054.22 and 639.23 is: 956.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.23 : 1,054.22 = 639.23 : x
  2. Step 2: Convert to fraction form
    704.23/1,054.22 = 639.23/x
  3. Step 3: Cross multiply
    704.23x = 1,054.22 × 639.23
  4. Step 4: Simplify right side
    704.23x = 673,880.58
  5. Step 5: Solve for x
    x = 673,880.58/704.23
  6. Step 6: Final answer
    x = 956.91

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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.