Home / 520,007,729.40-780,210,659.70-511,846,039.80

Finding the Fourth Proportional to 520,007,729.40, 780,210,659.70 and 511,846,039.80

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Solution

The fourth proportional to 520,007,729.40, 780,210,659.70 and 511,846,039.80 is: 767,965,000.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,007,729.40 : 780,210,659.70 = 511,846,039.80 : x
  2. Step 2: Convert to fraction form
    520,007,729.40/780,210,659.70 = 511,846,039.80/x
  3. Step 3: Cross multiply
    520,007,729.40x = 780,210,659.70 × 511,846,039.80
  4. Step 4: Simplify right side
    520,007,729.40x = 399,347,736,377,190,464
  5. Step 5: Solve for x
    x = 399,347,736,377,190,464/520,007,729.40
  6. Step 6: Final answer
    x = 767,965,000.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.