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Finding the Fourth Proportional to 386,784.66, 580,035.24 and 133,999.86

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Solution

The fourth proportional to 386,784.66, 580,035.24 and 133,999.86 is: 200,950.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,784.66 : 580,035.24 = 133,999.86 : x
  2. Step 2: Convert to fraction form
    386,784.66/580,035.24 = 133,999.86/x
  3. Step 3: Cross multiply
    386,784.66x = 580,035.24 × 133,999.86
  4. Step 4: Simplify right side
    386,784.66x = 77,724,640,955.07
  5. Step 5: Solve for x
    x = 77,724,640,955.07/386,784.66
  6. Step 6: Final answer
    x = 200,950.68

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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.