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Finding the Fourth Proportional to 492.36, 679.29 and 445.57

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Solution

The fourth proportional to 492.36, 679.29 and 445.57 is: 614.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.36 : 679.29 = 445.57 : x
  2. Step 2: Convert to fraction form
    492.36/679.29 = 445.57/x
  3. Step 3: Cross multiply
    492.36x = 679.29 × 445.57
  4. Step 4: Simplify right side
    492.36x = 302,671.25
  5. Step 5: Solve for x
    x = 302,671.25/492.36
  6. Step 6: Final answer
    x = 614.74

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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.