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Finding the Fourth Proportional to 468.71, 646.74 and 272.18

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Solution

The fourth proportional to 468.71, 646.74 and 272.18 is: 375.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    468.71 : 646.74 = 272.18 : x
  2. Step 2: Convert to fraction form
    468.71/646.74 = 272.18/x
  3. Step 3: Cross multiply
    468.71x = 646.74 × 272.18
  4. Step 4: Simplify right side
    468.71x = 176,031.31
  5. Step 5: Solve for x
    x = 176,031.31/468.71
  6. Step 6: Final answer
    x = 375.57

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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.