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Finding the Fourth Proportional to 479,297.71, 661,508.40 and 285,729.18

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Solution

The fourth proportional to 479,297.71, 661,508.40 and 285,729.18 is: 394,352.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,297.71 : 661,508.40 = 285,729.18 : x
  2. Step 2: Convert to fraction form
    479,297.71/661,508.40 = 285,729.18/x
  3. Step 3: Cross multiply
    479,297.71x = 661,508.40 × 285,729.18
  4. Step 4: Simplify right side
    479,297.71x = 189,012,252,695.11
  5. Step 5: Solve for x
    x = 189,012,252,695.11/479,297.71
  6. Step 6: Final answer
    x = 394,352.51

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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.