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Finding the Fourth Proportional to 400,428.99, 552,584.61 and 219,137.28

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Solution

The fourth proportional to 400,428.99, 552,584.61 and 219,137.28 is: 302,405.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,428.99 : 552,584.61 = 219,137.28 : x
  2. Step 2: Convert to fraction form
    400,428.99/552,584.61 = 219,137.28/x
  3. Step 3: Cross multiply
    400,428.99x = 552,584.61 × 219,137.28
  4. Step 4: Simplify right side
    400,428.99x = 121,091,888,405.26
  5. Step 5: Solve for x
    x = 121,091,888,405.26/400,428.99
  6. Step 6: Final answer
    x = 302,405.40

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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.