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Finding the Fourth Proportional to 426,695.23, 639,666.87 and 174,187.86

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Solution

The fourth proportional to 426,695.23, 639,666.87 and 174,187.86 is: 261,128.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,695.23 : 639,666.87 = 174,187.86 : x
  2. Step 2: Convert to fraction form
    426,695.23/639,666.87 = 174,187.86/x
  3. Step 3: Cross multiply
    426,695.23x = 639,666.87 × 174,187.86
  4. Step 4: Simplify right side
    426,695.23x = 111,422,203,198.20
  5. Step 5: Solve for x
    x = 111,422,203,198.20/426,695.23
  6. Step 6: Final answer
    x = 261,128.31

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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.