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Finding the Fourth Proportional to 352,818.11, 486,905.91 and 216,857.81

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Solution

The fourth proportional to 352,818.11, 486,905.91 and 216,857.81 is: 299,274.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,818.11 : 486,905.91 = 216,857.81 : x
  2. Step 2: Convert to fraction form
    352,818.11/486,905.91 = 216,857.81/x
  3. Step 3: Cross multiply
    352,818.11x = 486,905.91 × 216,857.81
  4. Step 4: Simplify right side
    352,818.11x = 105,589,349,318.66
  5. Step 5: Solve for x
    x = 105,589,349,318.66/352,818.11
  6. Step 6: Final answer
    x = 299,274.18

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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.