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Finding the Fourth Proportional to 472.31, 651.75 and 275.81

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Solution

The fourth proportional to 472.31, 651.75 and 275.81 is: 380.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.31 : 651.75 = 275.81 : x
  2. Step 2: Convert to fraction form
    472.31/651.75 = 275.81/x
  3. Step 3: Cross multiply
    472.31x = 651.75 × 275.81
  4. Step 4: Simplify right side
    472.31x = 179,755.91
  5. Step 5: Solve for x
    x = 179,755.91/472.31
  6. Step 6: Final answer
    x = 380.59

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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.