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Finding the Fourth Proportional to 399,028.82, 550,642.66 and 217,736.24

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Solution

The fourth proportional to 399,028.82, 550,642.66 and 217,736.24 is: 300,466.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,028.82 : 550,642.66 = 217,736.24 : x
  2. Step 2: Convert to fraction form
    399,028.82/550,642.66 = 217,736.24/x
  3. Step 3: Cross multiply
    399,028.82x = 550,642.66 × 217,736.24
  4. Step 4: Simplify right side
    399,028.82x = 119,894,859,074.45
  5. Step 5: Solve for x
    x = 119,894,859,074.45/399,028.82
  6. Step 6: Final answer
    x = 300,466.67

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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.