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Finding the Fourth Proportional to 307,791.21, 424,740.81 and 193,131.60

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Solution

The fourth proportional to 307,791.21, 424,740.81 and 193,131.60 is: 266,514.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,791.21 : 424,740.81 = 193,131.60 : x
  2. Step 2: Convert to fraction form
    307,791.21/424,740.81 = 193,131.60/x
  3. Step 3: Cross multiply
    307,791.21x = 424,740.81 × 193,131.60
  4. Step 4: Simplify right side
    307,791.21x = 82,030,872,220.60
  5. Step 5: Solve for x
    x = 82,030,872,220.60/307,791.21
  6. Step 6: Final answer
    x = 266,514.67

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1.5x scale

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.