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Finding the Fourth Proportional to 704.32, 971.78 and 455.56

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Solution

The fourth proportional to 704.32, 971.78 and 455.56 is: 628.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.32 : 971.78 = 455.56 : x
  2. Step 2: Convert to fraction form
    704.32/971.78 = 455.56/x
  3. Step 3: Cross multiply
    704.32x = 971.78 × 455.56
  4. Step 4: Simplify right side
    704.32x = 442,704.10
  5. Step 5: Solve for x
    x = 442,704.10/704.32
  6. Step 6: Final answer
    x = 628.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.