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Finding the Fourth Proportional to 429.10, 642.62 and 245.94

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Solution

The fourth proportional to 429.10, 642.62 and 245.94 is: 368.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    429.10 : 642.62 = 245.94 : x
  2. Step 2: Convert to fraction form
    429.10/642.62 = 245.94/x
  3. Step 3: Cross multiply
    429.10x = 642.62 × 245.94
  4. Step 4: Simplify right side
    429.10x = 158,045.96
  5. Step 5: Solve for x
    x = 158,045.96/429.10
  6. Step 6: Final answer
    x = 368.32

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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.