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Finding the Fourth Proportional to 492.73, 679.77 and 345.47

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Solution

The fourth proportional to 492.73, 679.77 and 345.47 is: 476.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.73 : 679.77 = 345.47 : x
  2. Step 2: Convert to fraction form
    492.73/679.77 = 345.47/x
  3. Step 3: Cross multiply
    492.73x = 679.77 × 345.47
  4. Step 4: Simplify right side
    492.73x = 234,835.77
  5. Step 5: Solve for x
    x = 234,835.77/492.73
  6. Step 6: Final answer
    x = 476.60

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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.