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Finding the Fourth Proportional to 318,099.80, 438,978.18 and 174,860.72

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Solution

The fourth proportional to 318,099.80, 438,978.18 and 174,860.72 is: 241,308.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,099.80 : 438,978.18 = 174,860.72 : x
  2. Step 2: Convert to fraction form
    318,099.80/438,978.18 = 174,860.72/x
  3. Step 3: Cross multiply
    318,099.80x = 438,978.18 × 174,860.72
  4. Step 4: Simplify right side
    318,099.80x = 76,760,040,619.09
  5. Step 5: Solve for x
    x = 76,760,040,619.09/318,099.80
  6. Step 6: Final answer
    x = 241,308.04

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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.