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Finding the Fourth Proportional to 468.05, 646.45 and 357.28

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Solution

The fourth proportional to 468.05, 646.45 and 357.28 is: 493.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    468.05 : 646.45 = 357.28 : x
  2. Step 2: Convert to fraction form
    468.05/646.45 = 357.28/x
  3. Step 3: Cross multiply
    468.05x = 646.45 × 357.28
  4. Step 4: Simplify right side
    468.05x = 230,961.15
  5. Step 5: Solve for x
    x = 230,961.15/468.05
  6. Step 6: Final answer
    x = 493.46

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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.