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Finding the Fourth Proportional to 643,368.87, 964,379.91 and 216,757.28

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Solution

The fourth proportional to 643,368.87, 964,379.91 and 216,757.28 is: 324,909.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,368.87 : 964,379.91 = 216,757.28 : x
  2. Step 2: Convert to fraction form
    643,368.87/964,379.91 = 216,757.28/x
  3. Step 3: Cross multiply
    643,368.87x = 964,379.91 × 216,757.28
  4. Step 4: Simplify right side
    643,368.87x = 209,036,361,356.35
  5. Step 5: Solve for x
    x = 209,036,361,356.35/643,368.87
  6. Step 6: Final answer
    x = 324,909.04

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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.