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Finding the Fourth Proportional to 289,980.92, 400,146.78 and 162,631.88

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Solution

The fourth proportional to 289,980.92, 400,146.78 and 162,631.88 is: 224,416.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,980.92 : 400,146.78 = 162,631.88 : x
  2. Step 2: Convert to fraction form
    289,980.92/400,146.78 = 162,631.88/x
  3. Step 3: Cross multiply
    289,980.92x = 400,146.78 × 162,631.88
  4. Step 4: Simplify right side
    289,980.92x = 65,076,623,107.35
  5. Step 5: Solve for x
    x = 65,076,623,107.35/289,980.92
  6. Step 6: Final answer
    x = 224,416.91

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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.