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Finding the Fourth Proportional to 389,286,010.80, 543,980,048.40 and 389,286,010.80

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Solution

The fourth proportional to 389,286,010.80, 543,980,048.40 and 389,286,010.80 is: 543,980,048.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,286,010.80 : 543,980,048.40 = 389,286,010.80 : x
  2. Step 2: Convert to fraction form
    389,286,010.80/543,980,048.40 = 389,286,010.80/x
  3. Step 3: Cross multiply
    389,286,010.80x = 543,980,048.40 × 389,286,010.80
  4. Step 4: Simplify right side
    389,286,010.80x = 211,763,822,996,426,912
  5. Step 5: Solve for x
    x = 211,763,822,996,426,912/389,286,010.80
  6. Step 6: Final answer
    x = 543,980,048.40

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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.