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Finding the Fourth Proportional to 704.52, 971.90 and 455.75

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Solution

The fourth proportional to 704.52, 971.90 and 455.75 is: 628.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.52 : 971.90 = 455.75 : x
  2. Step 2: Convert to fraction form
    704.52/971.90 = 455.75/x
  3. Step 3: Cross multiply
    704.52x = 971.90 × 455.75
  4. Step 4: Simplify right side
    704.52x = 442,943.43
  5. Step 5: Solve for x
    x = 442,943.43/704.52
  6. Step 6: Final answer
    x = 628.72

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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.