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Finding the Fourth Proportional to 289,429.81, 399,462.57 and 168,642.68

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Solution

The fourth proportional to 289,429.81, 399,462.57 and 168,642.68 is: 232,755.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,429.81 : 399,462.57 = 168,642.68 : x
  2. Step 2: Convert to fraction form
    289,429.81/399,462.57 = 168,642.68/x
  3. Step 3: Cross multiply
    289,429.81x = 399,462.57 × 168,642.68
  4. Step 4: Simplify right side
    289,429.81x = 67,366,435,523.96
  5. Step 5: Solve for x
    x = 67,366,435,523.96/289,429.81
  6. Step 6: Final answer
    x = 232,755.70

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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.