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Finding the Fourth Proportional to 704.39, 972.23 and 455.58

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Solution

The fourth proportional to 704.39, 972.23 and 455.58 is: 628.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.39 : 972.23 = 455.58 : x
  2. Step 2: Convert to fraction form
    704.39/972.23 = 455.58/x
  3. Step 3: Cross multiply
    704.39x = 972.23 × 455.58
  4. Step 4: Simplify right side
    704.39x = 442,926.27
  5. Step 5: Solve for x
    x = 442,926.27/704.39
  6. Step 6: Final answer
    x = 628.81

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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.