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Finding the Fourth Proportional to 520,679,672.78, 718,502,573.16 and 285,745,466.88

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Solution

The fourth proportional to 520,679,672.78, 718,502,573.16 and 285,745,466.88 is: 394,309,330.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,679,672.78 : 718,502,573.16 = 285,745,466.88 : x
  2. Step 2: Convert to fraction form
    520,679,672.78/718,502,573.16 = 285,745,466.88/x
  3. Step 3: Cross multiply
    520,679,672.78x = 718,502,573.16 × 285,745,466.88
  4. Step 4: Simplify right side
    520,679,672.78x = 205,308,853,222,085,536
  5. Step 5: Solve for x
    x = 205,308,853,222,085,536/520,679,672.78
  6. Step 6: Final answer
    x = 394,309,330.59

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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.