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Finding the Fourth Proportional to 724,020.72, 999,203.31 and 401,791.74

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Solution

The fourth proportional to 724,020.72, 999,203.31 and 401,791.74 is: 554,502.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,020.72 : 999,203.31 = 401,791.74 : x
  2. Step 2: Convert to fraction form
    724,020.72/999,203.31 = 401,791.74/x
  3. Step 3: Cross multiply
    724,020.72x = 999,203.31 × 401,791.74
  4. Step 4: Simplify right side
    724,020.72x = 401,471,636,538.66
  5. Step 5: Solve for x
    x = 401,471,636,538.66/724,020.72
  6. Step 6: Final answer
    x = 554,502.97

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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.