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Finding the Fourth Proportional to 646.82, 893.46 and 479.11

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Solution

The fourth proportional to 646.82, 893.46 and 479.11 is: 661.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.82 : 893.46 = 479.11 : x
  2. Step 2: Convert to fraction form
    646.82/893.46 = 479.11/x
  3. Step 3: Cross multiply
    646.82x = 893.46 × 479.11
  4. Step 4: Simplify right side
    646.82x = 428,065.22
  5. Step 5: Solve for x
    x = 428,065.22/646.82
  6. Step 6: Final answer
    x = 661.80

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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.