Home / 491,199,780.30-678,161,613.43-312,684,393.54

Finding the Fourth Proportional to 491,199,780.30, 678,161,613.43 and 312,684,393.54

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Solution

The fourth proportional to 491,199,780.30, 678,161,613.43 and 312,684,393.54 is: 431,699,201.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,199,780.30 : 678,161,613.43 = 312,684,393.54 : x
  2. Step 2: Convert to fraction form
    491,199,780.30/678,161,613.43 = 312,684,393.54/x
  3. Step 3: Cross multiply
    491,199,780.30x = 678,161,613.43 × 312,684,393.54
  4. Step 4: Simplify right side
    491,199,780.30x = 212,050,552,817,467,456
  5. Step 5: Solve for x
    x = 212,050,552,817,467,456/491,199,780.30
  6. Step 6: Final answer
    x = 431,699,201.27

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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.