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Finding the Fourth Proportional to 260,791.80, 391,187.70 and 243,166.20

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Solution

The fourth proportional to 260,791.80, 391,187.70 and 243,166.20 is: 364,749.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,791.80 : 391,187.70 = 243,166.20 : x
  2. Step 2: Convert to fraction form
    260,791.80/391,187.70 = 243,166.20/x
  3. Step 3: Cross multiply
    260,791.80x = 391,187.70 × 243,166.20
  4. Step 4: Simplify right side
    260,791.80x = 95,123,626,495.74
  5. Step 5: Solve for x
    x = 95,123,626,495.74/260,791.80
  6. Step 6: Final answer
    x = 364,749.30

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1.5x scale

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.