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Finding the Fourth Proportional to 400,712.92, 552,990.63 and 219,421.96

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Solution

The fourth proportional to 400,712.92, 552,990.63 and 219,421.96 is: 302,806.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,712.92 : 552,990.63 = 219,421.96 : x
  2. Step 2: Convert to fraction form
    400,712.92/552,990.63 = 219,421.96/x
  3. Step 3: Cross multiply
    400,712.92x = 552,990.63 × 219,421.96
  4. Step 4: Simplify right side
    400,712.92x = 121,338,287,896.24
  5. Step 5: Solve for x
    x = 121,338,287,896.24/400,712.92
  6. Step 6: Final answer
    x = 302,806.03

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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.