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Finding the Fourth Proportional to 356.42, 531.57 and 349.94

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Solution

The fourth proportional to 356.42, 531.57 and 349.94 is: 521.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.42 : 531.57 = 349.94 : x
  2. Step 2: Convert to fraction form
    356.42/531.57 = 349.94/x
  3. Step 3: Cross multiply
    356.42x = 531.57 × 349.94
  4. Step 4: Simplify right side
    356.42x = 186,017.61
  5. Step 5: Solve for x
    x = 186,017.61/356.42
  6. Step 6: Final answer
    x = 521.91

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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.