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Finding the Fourth Proportional to 284,856.60, 426,939.30 and 126,917.40

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Solution

The fourth proportional to 284,856.60, 426,939.30 and 126,917.40 is: 190,222.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    284,856.60 : 426,939.30 = 126,917.40 : x
  2. Step 2: Convert to fraction form
    284,856.60/426,939.30 = 126,917.40/x
  3. Step 3: Cross multiply
    284,856.60x = 426,939.30 × 126,917.40
  4. Step 4: Simplify right side
    284,856.60x = 54,186,025,913.82
  5. Step 5: Solve for x
    x = 54,186,025,913.82/284,856.60
  6. Step 6: Final answer
    x = 190,222.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.