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Finding the Fourth Proportional to 468.15, 646.03 and 281.79

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Solution

The fourth proportional to 468.15, 646.03 and 281.79 is: 388.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    468.15 : 646.03 = 281.79 : x
  2. Step 2: Convert to fraction form
    468.15/646.03 = 281.79/x
  3. Step 3: Cross multiply
    468.15x = 646.03 × 281.79
  4. Step 4: Simplify right side
    468.15x = 182,045.15
  5. Step 5: Solve for x
    x = 182,045.15/468.15
  6. Step 6: Final answer
    x = 388.86

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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.