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Finding the Fourth Proportional to 472.30, 651.76 and 275.81

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Solution

The fourth proportional to 472.30, 651.76 and 275.81 is: 380.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.30 : 651.76 = 275.81 : x
  2. Step 2: Convert to fraction form
    472.30/651.76 = 275.81/x
  3. Step 3: Cross multiply
    472.30x = 651.76 × 275.81
  4. Step 4: Simplify right side
    472.30x = 179,757.98
  5. Step 5: Solve for x
    x = 179,757.98/472.30
  6. Step 6: Final answer
    x = 380.60

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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.