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Finding the Fourth Proportional to 438,696.80, 658,045.20 and 106,272.80

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Solution

The fourth proportional to 438,696.80, 658,045.20 and 106,272.80 is: 159,409.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,696.80 : 658,045.20 = 106,272.80 : x
  2. Step 2: Convert to fraction form
    438,696.80/658,045.20 = 106,272.80/x
  3. Step 3: Cross multiply
    438,696.80x = 658,045.20 × 106,272.80
  4. Step 4: Simplify right side
    438,696.80x = 69,932,305,930.56
  5. Step 5: Solve for x
    x = 69,932,305,930.56/438,696.80
  6. Step 6: Final answer
    x = 159,409.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.