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Finding the Fourth Proportional to 425,830.18, 638,745.36 and 173,248.12

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Solution

The fourth proportional to 425,830.18, 638,745.36 and 173,248.12 is: 259,872.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,830.18 : 638,745.36 = 173,248.12 : x
  2. Step 2: Convert to fraction form
    425,830.18/638,745.36 = 173,248.12/x
  3. Step 3: Cross multiply
    425,830.18x = 638,745.36 × 173,248.12
  4. Step 4: Simplify right side
    425,830.18x = 110,661,432,778.72
  5. Step 5: Solve for x
    x = 110,661,432,778.72/425,830.18
  6. Step 6: Final answer
    x = 259,872.22

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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.