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Finding the Fourth Proportional to 468.24, 646.80 and 394.96

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Solution

The fourth proportional to 468.24, 646.80 and 394.96 is: 545.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    468.24 : 646.80 = 394.96 : x
  2. Step 2: Convert to fraction form
    468.24/646.80 = 394.96/x
  3. Step 3: Cross multiply
    468.24x = 646.80 × 394.96
  4. Step 4: Simplify right side
    468.24x = 255,460.13
  5. Step 5: Solve for x
    x = 255,460.13/468.24
  6. Step 6: Final answer
    x = 545.58

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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.