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Finding the Fourth Proportional to 404,879.10, 607,318.65 and 138,615.90

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Solution

The fourth proportional to 404,879.10, 607,318.65 and 138,615.90 is: 207,923.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,879.10 : 607,318.65 = 138,615.90 : x
  2. Step 2: Convert to fraction form
    404,879.10/607,318.65 = 138,615.90/x
  3. Step 3: Cross multiply
    404,879.10x = 607,318.65 × 138,615.90
  4. Step 4: Simplify right side
    404,879.10x = 84,184,021,256.54
  5. Step 5: Solve for x
    x = 84,184,021,256.54/404,879.10
  6. Step 6: Final answer
    x = 207,923.85

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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.