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Finding the Fourth Proportional to 391,585.90, 540,378.04 and 230,450.44

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Solution

The fourth proportional to 391,585.90, 540,378.04 and 230,450.44 is: 318,015.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,585.90 : 540,378.04 = 230,450.44 : x
  2. Step 2: Convert to fraction form
    391,585.90/540,378.04 = 230,450.44/x
  3. Step 3: Cross multiply
    391,585.90x = 540,378.04 × 230,450.44
  4. Step 4: Simplify right side
    391,585.90x = 124,530,353,230.20
  5. Step 5: Solve for x
    x = 124,530,353,230.20/391,585.90
  6. Step 6: Final answer
    x = 318,015.42

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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.