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Finding the Fourth Proportional to 640,308.91, 883,638.96 and 349,938.44

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Solution

The fourth proportional to 640,308.91, 883,638.96 and 349,938.44 is: 482,921.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,308.91 : 883,638.96 = 349,938.44 : x
  2. Step 2: Convert to fraction form
    640,308.91/883,638.96 = 349,938.44/x
  3. Step 3: Cross multiply
    640,308.91x = 883,638.96 × 349,938.44
  4. Step 4: Simplify right side
    640,308.91x = 309,219,239,185.62
  5. Step 5: Solve for x
    x = 309,219,239,185.62/640,308.91
  6. Step 6: Final answer
    x = 482,921.97

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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.