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Finding the Fourth Proportional to 640,427.59, 960,606.78 and 324,876.34

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Solution

The fourth proportional to 640,427.59, 960,606.78 and 324,876.34 is: 487,296.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,427.59 : 960,606.78 = 324,876.34 : x
  2. Step 2: Convert to fraction form
    640,427.59/960,606.78 = 324,876.34/x
  3. Step 3: Cross multiply
    640,427.59x = 960,606.78 × 324,876.34
  4. Step 4: Simplify right side
    640,427.59x = 312,078,414,865.59
  5. Step 5: Solve for x
    x = 312,078,414,865.59/640,427.59
  6. Step 6: Final answer
    x = 487,296.96

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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.