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Finding the Fourth Proportional to 425,783.40, 638,726.02 and 173,009.88

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Solution

The fourth proportional to 425,783.40, 638,726.02 and 173,009.88 is: 259,535.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,783.40 : 638,726.02 = 173,009.88 : x
  2. Step 2: Convert to fraction form
    425,783.40/638,726.02 = 173,009.88/x
  3. Step 3: Cross multiply
    425,783.40x = 638,726.02 × 173,009.88
  4. Step 4: Simplify right side
    425,783.40x = 110,505,912,073.08
  5. Step 5: Solve for x
    x = 110,505,912,073.08/425,783.40
  6. Step 6: Final answer
    x = 259,535.51

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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.