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Finding the Fourth Proportional to 279,574.21, 419,484.78 and 216,938.53

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Solution

The fourth proportional to 279,574.21, 419,484.78 and 216,938.53 is: 325,503.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,574.21 : 419,484.78 = 216,938.53 : x
  2. Step 2: Convert to fraction form
    279,574.21/419,484.78 = 216,938.53/x
  3. Step 3: Cross multiply
    279,574.21x = 419,484.78 × 216,938.53
  4. Step 4: Simplify right side
    279,574.21x = 91,002,410,445.88
  5. Step 5: Solve for x
    x = 91,002,410,445.88/279,574.21
  6. Step 6: Final answer
    x = 325,503.60

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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.