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Finding the Fourth Proportional to 662,811.20, 994,382.40 and 213,574.40

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Solution

The fourth proportional to 662,811.20, 994,382.40 and 213,574.40 is: 320,414.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,811.20 : 994,382.40 = 213,574.40 : x
  2. Step 2: Convert to fraction form
    662,811.20/994,382.40 = 213,574.40/x
  3. Step 3: Cross multiply
    662,811.20x = 994,382.40 × 213,574.40
  4. Step 4: Simplify right side
    662,811.20x = 212,374,624,450.56
  5. Step 5: Solve for x
    x = 212,374,624,450.56/662,811.20
  6. Step 6: Final answer
    x = 320,414.96

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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.