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Finding the Fourth Proportional to 492.51, 679.49 and 305.93

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Solution

The fourth proportional to 492.51, 679.49 and 305.93 is: 422.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.51 : 679.49 = 305.93 : x
  2. Step 2: Convert to fraction form
    492.51/679.49 = 305.93/x
  3. Step 3: Cross multiply
    492.51x = 679.49 × 305.93
  4. Step 4: Simplify right side
    492.51x = 207,876.38
  5. Step 5: Solve for x
    x = 207,876.38/492.51
  6. Step 6: Final answer
    x = 422.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.