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Finding the Fourth Proportional to 518,399.28, 777,305.95 and 214,621.64

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Solution

The fourth proportional to 518,399.28, 777,305.95 and 214,621.64 is: 321,811.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,399.28 : 777,305.95 = 214,621.64 : x
  2. Step 2: Convert to fraction form
    518,399.28/777,305.95 = 214,621.64/x
  3. Step 3: Cross multiply
    518,399.28x = 777,305.95 × 214,621.64
  4. Step 4: Simplify right side
    518,399.28x = 166,826,677,770.76
  5. Step 5: Solve for x
    x = 166,826,677,770.76/518,399.28
  6. Step 6: Final answer
    x = 321,811.17

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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.