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Finding the Fourth Proportional to 399,667.75, 599,541.48 and 115,365.20

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Solution

The fourth proportional to 399,667.75, 599,541.48 and 115,365.20 is: 173,059.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,667.75 : 599,541.48 = 115,365.20 : x
  2. Step 2: Convert to fraction form
    399,667.75/599,541.48 = 115,365.20/x
  3. Step 3: Cross multiply
    399,667.75x = 599,541.48 × 115,365.20
  4. Step 4: Simplify right side
    399,667.75x = 69,166,219,750.79
  5. Step 5: Solve for x
    x = 69,166,219,750.79/399,667.75
  6. Step 6: Final answer
    x = 173,059.30

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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.