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Finding the Fourth Proportional to 426,370.76, 638,945.90 and 313,163

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Solution

The fourth proportional to 426,370.76, 638,945.90 and 313,163 is: 469,296.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,370.76 : 638,945.90 = 313,163 : x
  2. Step 2: Convert to fraction form
    426,370.76/638,945.90 = 313,163/x
  3. Step 3: Cross multiply
    426,370.76x = 638,945.90 × 313,163
  4. Step 4: Simplify right side
    426,370.76x = 200,094,214,881.70
  5. Step 5: Solve for x
    x = 200,094,214,881.70/426,370.76
  6. Step 6: Final answer
    x = 469,296.29

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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.