Home / 491,199,778.80-678,161,611.36-312,684,392.04

Finding the Fourth Proportional to 491,199,778.80, 678,161,611.36 and 312,684,392.04

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Solution

The fourth proportional to 491,199,778.80, 678,161,611.36 and 312,684,392.04 is: 431,699,199.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,199,778.80 : 678,161,611.36 = 312,684,392.04 : x
  2. Step 2: Convert to fraction form
    491,199,778.80/678,161,611.36 = 312,684,392.04/x
  3. Step 3: Cross multiply
    491,199,778.80x = 678,161,611.36 × 312,684,392.04
  4. Step 4: Simplify right side
    491,199,778.80x = 212,050,551,152,968,384
  5. Step 5: Solve for x
    x = 212,050,551,152,968,384/491,199,778.80
  6. Step 6: Final answer
    x = 431,699,199.20

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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.