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Finding the Fourth Proportional to 492.24, 679 and 345.23

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Solution

The fourth proportional to 492.24, 679 and 345.23 is: 476.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.24 : 679 = 345.23 : x
  2. Step 2: Convert to fraction form
    492.24/679 = 345.23/x
  3. Step 3: Cross multiply
    492.24x = 679 × 345.23
  4. Step 4: Simplify right side
    492.24x = 234,411.17
  5. Step 5: Solve for x
    x = 234,411.17/492.24
  6. Step 6: Final answer
    x = 476.21

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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.