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Finding the Fourth Proportional to 429.00, 642.13 and 298.38

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Solution

The fourth proportional to 429.00, 642.13 and 298.38 is: 446.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    429.00 : 642.13 = 298.38 : x
  2. Step 2: Convert to fraction form
    429.00/642.13 = 298.38/x
  3. Step 3: Cross multiply
    429.00x = 642.13 × 298.38
  4. Step 4: Simplify right side
    429.00x = 191,600.41
  5. Step 5: Solve for x
    x = 191,600.41/429.00
  6. Step 6: Final answer
    x = 446.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.