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Finding the Fourth Proportional to 472.21, 651.40 and 275.69

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Solution

The fourth proportional to 472.21, 651.40 and 275.69 is: 380.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.21 : 651.40 = 275.69 : x
  2. Step 2: Convert to fraction form
    472.21/651.40 = 275.69/x
  3. Step 3: Cross multiply
    472.21x = 651.40 × 275.69
  4. Step 4: Simplify right side
    472.21x = 179,585.41
  5. Step 5: Solve for x
    x = 179,585.41/472.21
  6. Step 6: Final answer
    x = 380.31

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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.