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Finding the Fourth Proportional to 640,202.79, 883,497.67 and 353,741.33

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Solution

The fourth proportional to 640,202.79, 883,497.67 and 353,741.33 is: 488,172.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,202.79 : 883,497.67 = 353,741.33 : x
  2. Step 2: Convert to fraction form
    640,202.79/883,497.67 = 353,741.33/x
  3. Step 3: Cross multiply
    640,202.79x = 883,497.67 × 353,741.33
  4. Step 4: Simplify right side
    640,202.79x = 312,529,636,420.21
  5. Step 5: Solve for x
    x = 312,529,636,420.21/640,202.79
  6. Step 6: Final answer
    x = 488,172.87

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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.