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Finding the Fourth Proportional to 551,676.36, 761,314.04 and 309,958.78

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Solution

The fourth proportional to 551,676.36, 761,314.04 and 309,958.78 is: 427,743.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,676.36 : 761,314.04 = 309,958.78 : x
  2. Step 2: Convert to fraction form
    551,676.36/761,314.04 = 309,958.78/x
  3. Step 3: Cross multiply
    551,676.36x = 761,314.04 × 309,958.78
  4. Step 4: Simplify right side
    551,676.36x = 235,975,971,035.27
  5. Step 5: Solve for x
    x = 235,975,971,035.27/551,676.36
  6. Step 6: Final answer
    x = 427,743.49

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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.