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Finding the Fourth Proportional to 665,796.39, 918,540.86 and 424,035.69

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Solution

The fourth proportional to 665,796.39, 918,540.86 and 424,035.69 is: 585,004.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,796.39 : 918,540.86 = 424,035.69 : x
  2. Step 2: Convert to fraction form
    665,796.39/918,540.86 = 424,035.69/x
  3. Step 3: Cross multiply
    665,796.39x = 918,540.86 × 424,035.69
  4. Step 4: Simplify right side
    665,796.39x = 389,494,105,243.12
  5. Step 5: Solve for x
    x = 389,494,105,243.12/665,796.39
  6. Step 6: Final answer
    x = 585,004.83

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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.