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Finding the Fourth Proportional to 289,710.28, 399,812.49 and 162,385.88

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Solution

The fourth proportional to 289,710.28, 399,812.49 and 162,385.88 is: 224,099.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,710.28 : 399,812.49 = 162,385.88 : x
  2. Step 2: Convert to fraction form
    289,710.28/399,812.49 = 162,385.88/x
  3. Step 3: Cross multiply
    289,710.28x = 399,812.49 × 162,385.88
  4. Step 4: Simplify right side
    289,710.28x = 64,923,901,024.58
  5. Step 5: Solve for x
    x = 64,923,901,024.58/289,710.28
  6. Step 6: Final answer
    x = 224,099.40

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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.