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Finding the Fourth Proportional to 399,080.60, 550,742.90 and 217,804.14

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Solution

The fourth proportional to 399,080.60, 550,742.90 and 217,804.14 is: 300,576.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,080.60 : 550,742.90 = 217,804.14 : x
  2. Step 2: Convert to fraction form
    399,080.60/550,742.90 = 217,804.14/x
  3. Step 3: Cross multiply
    399,080.60x = 550,742.90 × 217,804.14
  4. Step 4: Simplify right side
    399,080.60x = 119,954,082,606.59
  5. Step 5: Solve for x
    x = 119,954,082,606.59/399,080.60
  6. Step 6: Final answer
    x = 300,576.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.