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Finding the Fourth Proportional to 426,694.23, 639,665.37 and 174,186.86

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Solution

The fourth proportional to 426,694.23, 639,665.37 and 174,186.86 is: 261,126.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,694.23 : 639,665.37 = 174,186.86 : x
  2. Step 2: Convert to fraction form
    426,694.23/639,665.37 = 174,186.86/x
  3. Step 3: Cross multiply
    426,694.23x = 639,665.37 × 174,186.86
  4. Step 4: Simplify right side
    426,694.23x = 111,421,299,052.71
  5. Step 5: Solve for x
    x = 111,421,299,052.71/426,694.23
  6. Step 6: Final answer
    x = 261,126.80

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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.