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Finding the Fourth Proportional to 258,649.56, 388,018.08 and 118,419.12

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Solution

The fourth proportional to 258,649.56, 388,018.08 and 118,419.12 is: 177,648.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,649.56 : 388,018.08 = 118,419.12 : x
  2. Step 2: Convert to fraction form
    258,649.56/388,018.08 = 118,419.12/x
  3. Step 3: Cross multiply
    258,649.56x = 388,018.08 × 118,419.12
  4. Step 4: Simplify right side
    258,649.56x = 45,948,759,577.69
  5. Step 5: Solve for x
    x = 45,948,759,577.69/258,649.56
  6. Step 6: Final answer
    x = 177,648.71

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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.