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Finding the Fourth Proportional to 391,730.43, 540,389.04 and 255,843.92

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Solution

The fourth proportional to 391,730.43, 540,389.04 and 255,843.92 is: 352,934.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,730.43 : 540,389.04 = 255,843.92 : x
  2. Step 2: Convert to fraction form
    391,730.43/540,389.04 = 255,843.92/x
  3. Step 3: Cross multiply
    391,730.43x = 540,389.04 × 255,843.92
  4. Step 4: Simplify right side
    391,730.43x = 138,255,247,670.51
  5. Step 5: Solve for x
    x = 138,255,247,670.51/391,730.43
  6. Step 6: Final answer
    x = 352,934.67

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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.