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Finding the Fourth Proportional to 425.08, 637.92 and 193.99

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Solution

The fourth proportional to 425.08, 637.92 and 193.99 is: 291.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.08 : 637.92 = 193.99 : x
  2. Step 2: Convert to fraction form
    425.08/637.92 = 193.99/x
  3. Step 3: Cross multiply
    425.08x = 637.92 × 193.99
  4. Step 4: Simplify right side
    425.08x = 123,750.10
  5. Step 5: Solve for x
    x = 123,750.10/425.08
  6. Step 6: Final answer
    x = 291.12

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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.