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Finding the Fourth Proportional to 356.07, 489.53 and 353.85

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Solution

The fourth proportional to 356.07, 489.53 and 353.85 is: 486.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.07 : 489.53 = 353.85 : x
  2. Step 2: Convert to fraction form
    356.07/489.53 = 353.85/x
  3. Step 3: Cross multiply
    356.07x = 489.53 × 353.85
  4. Step 4: Simplify right side
    356.07x = 173,218.78
  5. Step 5: Solve for x
    x = 173,218.78/356.07
  6. Step 6: Final answer
    x = 486.47

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.