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Finding the Fourth Proportional to 472.42, 651.25 and 306.57

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Solution

The fourth proportional to 472.42, 651.25 and 306.57 is: 422.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.42 : 651.25 = 306.57 : x
  2. Step 2: Convert to fraction form
    472.42/651.25 = 306.57/x
  3. Step 3: Cross multiply
    472.42x = 651.25 × 306.57
  4. Step 4: Simplify right side
    472.42x = 199,653.71
  5. Step 5: Solve for x
    x = 199,653.71/472.42
  6. Step 6: Final answer
    x = 422.62

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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.