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Finding the Fourth Proportional to 640,905.62, 960,090.37 and 521,096.29

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Solution

The fourth proportional to 640,905.62, 960,090.37 and 521,096.29 is: 780,613.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,905.62 : 960,090.37 = 521,096.29 : x
  2. Step 2: Convert to fraction form
    640,905.62/960,090.37 = 521,096.29/x
  3. Step 3: Cross multiply
    640,905.62x = 960,090.37 × 521,096.29
  4. Step 4: Simplify right side
    640,905.62x = 500,299,526,168.76
  5. Step 5: Solve for x
    x = 500,299,526,168.76/640,905.62
  6. Step 6: Final answer
    x = 780,613.42

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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.