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Finding the Fourth Proportional to 386,626.72, 579,648.48 and 253,540.48

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Solution

The fourth proportional to 386,626.72, 579,648.48 and 253,540.48 is: 380,119.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,626.72 : 579,648.48 = 253,540.48 : x
  2. Step 2: Convert to fraction form
    386,626.72/579,648.48 = 253,540.48/x
  3. Step 3: Cross multiply
    386,626.72x = 579,648.48 × 253,540.48
  4. Step 4: Simplify right side
    386,626.72x = 146,964,353,850.47
  5. Step 5: Solve for x
    x = 146,964,353,850.47/386,626.72
  6. Step 6: Final answer
    x = 380,119.50

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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.