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Finding the Fourth Proportional to 391,762.92, 540,748.36 and 255,818

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Solution

The fourth proportional to 391,762.92, 540,748.36 and 255,818 is: 353,104.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,762.92 : 540,748.36 = 255,818 : x
  2. Step 2: Convert to fraction form
    391,762.92/540,748.36 = 255,818/x
  3. Step 3: Cross multiply
    391,762.92x = 540,748.36 × 255,818
  4. Step 4: Simplify right side
    391,762.92x = 138,333,163,958.48
  5. Step 5: Solve for x
    x = 138,333,163,958.48/391,762.92
  6. Step 6: Final answer
    x = 353,104.28

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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.