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Finding the Fourth Proportional to 438,579.92, 605,174.76 and 257,223.44

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Solution

The fourth proportional to 438,579.92, 605,174.76 and 257,223.44 is: 354,929.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,579.92 : 605,174.76 = 257,223.44 : x
  2. Step 2: Convert to fraction form
    438,579.92/605,174.76 = 257,223.44/x
  3. Step 3: Cross multiply
    438,579.92x = 605,174.76 × 257,223.44
  4. Step 4: Simplify right side
    438,579.92x = 155,665,133,568.37
  5. Step 5: Solve for x
    x = 155,665,133,568.37/438,579.92
  6. Step 6: Final answer
    x = 354,929.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.