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Finding the Fourth Proportional to 399,415,139.20, 559,936,169.60 and 399,415,139.20

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Solution

The fourth proportional to 399,415,139.20, 559,936,169.60 and 399,415,139.20 is: 559,936,169.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,415,139.20 : 559,936,169.60 = 399,415,139.20 : x
  2. Step 2: Convert to fraction form
    399,415,139.20/559,936,169.60 = 399,415,139.20/x
  3. Step 3: Cross multiply
    399,415,139.20x = 559,936,169.60 × 399,415,139.20
  4. Step 4: Simplify right side
    399,415,139.20x = 223,646,983,123,898,816
  5. Step 5: Solve for x
    x = 223,646,983,123,898,816/399,415,139.20
  6. Step 6: Final answer
    x = 559,936,169.60

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.