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Finding the Fourth Proportional to 468.91, 647.25 and 272.39

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Solution

The fourth proportional to 468.91, 647.25 and 272.39 is: 375.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    468.91 : 647.25 = 272.39 : x
  2. Step 2: Convert to fraction form
    468.91/647.25 = 272.39/x
  3. Step 3: Cross multiply
    468.91x = 647.25 × 272.39
  4. Step 4: Simplify right side
    468.91x = 176,303.91
  5. Step 5: Solve for x
    x = 176,303.91/468.91
  6. Step 6: Final answer
    x = 375.98

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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.