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Finding the Fourth Proportional to 438,708.80, 658,063.20 and 123,219.20

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Solution

The fourth proportional to 438,708.80, 658,063.20 and 123,219.20 is: 184,828.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,708.80 : 658,063.20 = 123,219.20 : x
  2. Step 2: Convert to fraction form
    438,708.80/658,063.20 = 123,219.20/x
  3. Step 3: Cross multiply
    438,708.80x = 658,063.20 × 123,219.20
  4. Step 4: Simplify right side
    438,708.80x = 81,086,021,053.44
  5. Step 5: Solve for x
    x = 81,086,021,053.44/438,708.80
  6. Step 6: Final answer
    x = 184,828.80

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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.