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Finding the Fourth Proportional to 648.55, 893.43 and 482.47

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Solution

The fourth proportional to 648.55, 893.43 and 482.47 is: 664.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.55 : 893.43 = 482.47 : x
  2. Step 2: Convert to fraction form
    648.55/893.43 = 482.47/x
  3. Step 3: Cross multiply
    648.55x = 893.43 × 482.47
  4. Step 4: Simplify right side
    648.55x = 431,053.17
  5. Step 5: Solve for x
    x = 431,053.17/648.55
  6. Step 6: Final answer
    x = 664.64

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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.