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Finding the Fourth Proportional to 321,368.70, 482,571.45 and 216,651.90

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Solution

The fourth proportional to 321,368.70, 482,571.45 and 216,651.90 is: 325,327.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,368.70 : 482,571.45 = 216,651.90 : x
  2. Step 2: Convert to fraction form
    321,368.70/482,571.45 = 216,651.90/x
  3. Step 3: Cross multiply
    321,368.70x = 482,571.45 × 216,651.90
  4. Step 4: Simplify right side
    321,368.70x = 104,550,021,528.26
  5. Step 5: Solve for x
    x = 104,550,021,528.26/321,368.70
  6. Step 6: Final answer
    x = 325,327.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.