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Finding the Fourth Proportional to 260,908.59, 391,315.77 and 118,720.38

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Solution

The fourth proportional to 260,908.59, 391,315.77 and 118,720.38 is: 178,059.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,908.59 : 391,315.77 = 118,720.38 : x
  2. Step 2: Convert to fraction form
    260,908.59/391,315.77 = 118,720.38/x
  3. Step 3: Cross multiply
    260,908.59x = 391,315.77 × 118,720.38
  4. Step 4: Simplify right side
    260,908.59x = 46,457,156,914.39
  5. Step 5: Solve for x
    x = 46,457,156,914.39/260,908.59
  6. Step 6: Final answer
    x = 178,059.13

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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.