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Finding the Fourth Proportional to 704.59, 972.54 and 455.90

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Solution

The fourth proportional to 704.59, 972.54 and 455.90 is: 629.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.59 : 972.54 = 455.90 : x
  2. Step 2: Convert to fraction form
    704.59/972.54 = 455.90/x
  3. Step 3: Cross multiply
    704.59x = 972.54 × 455.90
  4. Step 4: Simplify right side
    704.59x = 443,381.59
  5. Step 5: Solve for x
    x = 443,381.59/704.59
  6. Step 6: Final answer
    x = 629.28

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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.