Home / 491,199,777.30-678,161,609.29-312,684,390.54

Finding the Fourth Proportional to 491,199,777.30, 678,161,609.29 and 312,684,390.54

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Solution

The fourth proportional to 491,199,777.30, 678,161,609.29 and 312,684,390.54 is: 431,699,197.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,199,777.30 : 678,161,609.29 = 312,684,390.54 : x
  2. Step 2: Convert to fraction form
    491,199,777.30/678,161,609.29 = 312,684,390.54/x
  3. Step 3: Cross multiply
    491,199,777.30x = 678,161,609.29 × 312,684,390.54
  4. Step 4: Simplify right side
    491,199,777.30x = 212,050,549,488,469,248
  5. Step 5: Solve for x
    x = 212,050,549,488,469,248/491,199,777.30
  6. Step 6: Final answer
    x = 431,699,197.13

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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.