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Finding the Fourth Proportional to 352,817.11, 486,904.53 and 216,856.81

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Solution

The fourth proportional to 352,817.11, 486,904.53 and 216,856.81 is: 299,272.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,817.11 : 486,904.53 = 216,856.81 : x
  2. Step 2: Convert to fraction form
    352,817.11/486,904.53 = 216,856.81/x
  3. Step 3: Cross multiply
    352,817.11x = 486,904.53 × 216,856.81
  4. Step 4: Simplify right side
    352,817.11x = 105,588,563,150.35
  5. Step 5: Solve for x
    x = 105,588,563,150.35/352,817.11
  6. Step 6: Final answer
    x = 299,272.80

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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.