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Finding the Fourth Proportional to 468.18, 646.12 and 310.55

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Solution

The fourth proportional to 468.18, 646.12 and 310.55 is: 428.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    468.18 : 646.12 = 310.55 : x
  2. Step 2: Convert to fraction form
    468.18/646.12 = 310.55/x
  3. Step 3: Cross multiply
    468.18x = 646.12 × 310.55
  4. Step 4: Simplify right side
    468.18x = 200,649.72
  5. Step 5: Solve for x
    x = 200,649.72/468.18
  6. Step 6: Final answer
    x = 428.57

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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.