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Finding the Fourth Proportional to 468.51, 646.55 and 272.15

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Solution

The fourth proportional to 468.51, 646.55 and 272.15 is: 375.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    468.51 : 646.55 = 272.15 : x
  2. Step 2: Convert to fraction form
    468.51/646.55 = 272.15/x
  3. Step 3: Cross multiply
    468.51x = 646.55 × 272.15
  4. Step 4: Simplify right side
    468.51x = 175,953.99
  5. Step 5: Solve for x
    x = 175,953.99/468.51
  6. Step 6: Final answer
    x = 375.56

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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.