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Finding the Fourth Proportional to 356.05, 531.21 and 304.71

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Solution

The fourth proportional to 356.05, 531.21 and 304.71 is: 454.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.05 : 531.21 = 304.71 : x
  2. Step 2: Convert to fraction form
    356.05/531.21 = 304.71/x
  3. Step 3: Cross multiply
    356.05x = 531.21 × 304.71
  4. Step 4: Simplify right side
    356.05x = 161,865.42
  5. Step 5: Solve for x
    x = 161,865.42/356.05
  6. Step 6: Final answer
    x = 454.62

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.