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Finding the Fourth Proportional to 431,372.10, 647,058.15 and 378,884.10

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Solution

The fourth proportional to 431,372.10, 647,058.15 and 378,884.10 is: 568,326.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,372.10 : 647,058.15 = 378,884.10 : x
  2. Step 2: Convert to fraction form
    431,372.10/647,058.15 = 378,884.10/x
  3. Step 3: Cross multiply
    431,372.10x = 647,058.15 × 378,884.10
  4. Step 4: Simplify right side
    431,372.10x = 245,160,044,810.42
  5. Step 5: Solve for x
    x = 245,160,044,810.42/431,372.10
  6. Step 6: Final answer
    x = 568,326.15

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Similar ratio
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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.