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Finding the Fourth Proportional to 492,879.18, 679,860.09 and 323,124.24

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Solution

The fourth proportional to 492,879.18, 679,860.09 and 323,124.24 is: 445,706.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,879.18 : 679,860.09 = 323,124.24 : x
  2. Step 2: Convert to fraction form
    492,879.18/679,860.09 = 323,124.24/x
  3. Step 3: Cross multiply
    492,879.18x = 679,860.09 × 323,124.24
  4. Step 4: Simplify right side
    492,879.18x = 219,679,274,887.58
  5. Step 5: Solve for x
    x = 219,679,274,887.58/492,879.18
  6. Step 6: Final answer
    x = 445,706.14

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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.