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Finding the Fourth Proportional to 461.92, 690.72 and 455.44

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Solution

The fourth proportional to 461.92, 690.72 and 455.44 is: 681.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.92 : 690.72 = 455.44 : x
  2. Step 2: Convert to fraction form
    461.92/690.72 = 455.44/x
  3. Step 3: Cross multiply
    461.92x = 690.72 × 455.44
  4. Step 4: Simplify right side
    461.92x = 314,581.52
  5. Step 5: Solve for x
    x = 314,581.52/461.92
  6. Step 6: Final answer
    x = 681.03

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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.