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Finding the Fourth Proportional to 425,439.56, 638,270.04 and 159,221

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Solution

The fourth proportional to 425,439.56, 638,270.04 and 159,221 is: 238,872.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,439.56 : 638,270.04 = 159,221 : x
  2. Step 2: Convert to fraction form
    425,439.56/638,270.04 = 159,221/x
  3. Step 3: Cross multiply
    425,439.56x = 638,270.04 × 159,221
  4. Step 4: Simplify right side
    425,439.56x = 101,625,994,038.84
  5. Step 5: Solve for x
    x = 101,625,994,038.84/425,439.56
  6. Step 6: Final answer
    x = 238,872.93

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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.