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Finding the Fourth Proportional to 426,540.99, 639,809.67 and 173,765.10

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Solution

The fourth proportional to 426,540.99, 639,809.67 and 173,765.10 is: 260,646.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,540.99 : 639,809.67 = 173,765.10 : x
  2. Step 2: Convert to fraction form
    426,540.99/639,809.67 = 173,765.10/x
  3. Step 3: Cross multiply
    426,540.99x = 639,809.67 × 173,765.10
  4. Step 4: Simplify right side
    426,540.99x = 111,176,591,288.52
  5. Step 5: Solve for x
    x = 111,176,591,288.52/426,540.99
  6. Step 6: Final answer
    x = 260,646.91

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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.