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Finding the Fourth Proportional to 357,351.36, 493,375.66 and 221,530.46

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Solution

The fourth proportional to 357,351.36, 493,375.66 and 221,530.46 is: 305,855.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    357,351.36 : 493,375.66 = 221,530.46 : x
  2. Step 2: Convert to fraction form
    357,351.36/493,375.66 = 221,530.46/x
  3. Step 3: Cross multiply
    357,351.36x = 493,375.66 × 221,530.46
  4. Step 4: Simplify right side
    357,351.36x = 109,297,736,912.60
  5. Step 5: Solve for x
    x = 109,297,736,912.60/357,351.36
  6. Step 6: Final answer
    x = 305,855.10

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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.