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Finding the Fourth Proportional to 391,763.92, 540,749.74 and 255,819

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Solution

The fourth proportional to 391,763.92, 540,749.74 and 255,819 is: 353,105.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,763.92 : 540,749.74 = 255,819 : x
  2. Step 2: Convert to fraction form
    391,763.92/540,749.74 = 255,819/x
  3. Step 3: Cross multiply
    391,763.92x = 540,749.74 × 255,819
  4. Step 4: Simplify right side
    391,763.92x = 138,334,057,737.06
  5. Step 5: Solve for x
    x = 138,334,057,737.06/391,763.92
  6. Step 6: Final answer
    x = 353,105.66

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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.