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Finding the Fourth Proportional to 425,278.98, 638,185.47 and 172,560.48

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Solution

The fourth proportional to 425,278.98, 638,185.47 and 172,560.48 is: 258,949.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,278.98 : 638,185.47 = 172,560.48 : x
  2. Step 2: Convert to fraction form
    425,278.98/638,185.47 = 172,560.48/x
  3. Step 3: Cross multiply
    425,278.98x = 638,185.47 × 172,560.48
  4. Step 4: Simplify right side
    425,278.98x = 110,125,591,032.23
  5. Step 5: Solve for x
    x = 110,125,591,032.23/425,278.98
  6. Step 6: Final answer
    x = 258,949.06

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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.