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Finding the Fourth Proportional to 558,846.72, 838,261.92 and 138,122.64

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Solution

The fourth proportional to 558,846.72, 838,261.92 and 138,122.64 is: 207,181.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    558,846.72 : 838,261.92 = 138,122.64 : x
  2. Step 2: Convert to fraction form
    558,846.72/838,261.92 = 138,122.64/x
  3. Step 3: Cross multiply
    558,846.72x = 838,261.92 × 138,122.64
  4. Step 4: Simplify right side
    558,846.72x = 115,782,949,401.87
  5. Step 5: Solve for x
    x = 115,782,949,401.87/558,846.72
  6. Step 6: Final answer
    x = 207,181.94

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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.