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Finding the Fourth Proportional to 468.38, 646.40 and 293.69

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Solution

The fourth proportional to 468.38, 646.40 and 293.69 is: 405.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    468.38 : 646.40 = 293.69 : x
  2. Step 2: Convert to fraction form
    468.38/646.40 = 293.69/x
  3. Step 3: Cross multiply
    468.38x = 646.40 × 293.69
  4. Step 4: Simplify right side
    468.38x = 189,838.72
  5. Step 5: Solve for x
    x = 189,838.72/468.38
  6. Step 6: Final answer
    x = 405.31

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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.