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Finding the Fourth Proportional to 472.39, 651.89 and 275.89

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Solution

The fourth proportional to 472.39, 651.89 and 275.89 is: 380.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.39 : 651.89 = 275.89 : x
  2. Step 2: Convert to fraction form
    472.39/651.89 = 275.89/x
  3. Step 3: Cross multiply
    472.39x = 651.89 × 275.89
  4. Step 4: Simplify right side
    472.39x = 179,849.93
  5. Step 5: Solve for x
    x = 179,849.93/472.39
  6. Step 6: Final answer
    x = 380.72

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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.