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Finding the Fourth Proportional to 468.76, 646.86 and 272.26

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Solution

The fourth proportional to 468.76, 646.86 and 272.26 is: 375.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    468.76 : 646.86 = 272.26 : x
  2. Step 2: Convert to fraction form
    468.76/646.86 = 272.26/x
  3. Step 3: Cross multiply
    468.76x = 646.86 × 272.26
  4. Step 4: Simplify right side
    468.76x = 176,114.10
  5. Step 5: Solve for x
    x = 176,114.10/468.76
  6. Step 6: Final answer
    x = 375.70

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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.