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Finding the Fourth Proportional to 380,791.38, 571,273.26 and 128,064.92

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Solution

The fourth proportional to 380,791.38, 571,273.26 and 128,064.92 is: 192,126.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,791.38 : 571,273.26 = 128,064.92 : x
  2. Step 2: Convert to fraction form
    380,791.38/571,273.26 = 128,064.92/x
  3. Step 3: Cross multiply
    380,791.38x = 571,273.26 × 128,064.92
  4. Step 4: Simplify right side
    380,791.38x = 73,160,061,483.67
  5. Step 5: Solve for x
    x = 73,160,061,483.67/380,791.38
  6. Step 6: Final answer
    x = 192,126.36

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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.