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Finding the Fourth Proportional to 260,703.90, 391,201.65 and 110,918.70

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Solution

The fourth proportional to 260,703.90, 391,201.65 and 110,918.70 is: 166,440.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,703.90 : 391,201.65 = 110,918.70 : x
  2. Step 2: Convert to fraction form
    260,703.90/391,201.65 = 110,918.70/x
  3. Step 3: Cross multiply
    260,703.90x = 391,201.65 × 110,918.70
  4. Step 4: Simplify right side
    260,703.90x = 43,391,578,455.86
  5. Step 5: Solve for x
    x = 43,391,578,455.86/260,703.90
  6. Step 6: Final answer
    x = 166,440.08

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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.