Home / 491,199,777.80-678,161,609.98-312,684,391.04

Finding the Fourth Proportional to 491,199,777.80, 678,161,609.98 and 312,684,391.04

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Solution

The fourth proportional to 491,199,777.80, 678,161,609.98 and 312,684,391.04 is: 431,699,197.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,199,777.80 : 678,161,609.98 = 312,684,391.04 : x
  2. Step 2: Convert to fraction form
    491,199,777.80/678,161,609.98 = 312,684,391.04/x
  3. Step 3: Cross multiply
    491,199,777.80x = 678,161,609.98 × 312,684,391.04
  4. Step 4: Simplify right side
    491,199,777.80x = 212,050,550,043,302,304
  5. Step 5: Solve for x
    x = 212,050,550,043,302,304/491,199,777.80
  6. Step 6: Final answer
    x = 431,699,197.82

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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.