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Finding the Fourth Proportional to 258,681,200.55, 388,021,800.83 and 258,681,200.55

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Solution

The fourth proportional to 258,681,200.55, 388,021,800.83 and 258,681,200.55 is: 388,021,800.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,681,200.55 : 388,021,800.83 = 258,681,200.55 : x
  2. Step 2: Convert to fraction form
    258,681,200.55/388,021,800.83 = 258,681,200.55/x
  3. Step 3: Cross multiply
    258,681,200.55x = 388,021,800.83 × 258,681,200.55
  4. Step 4: Simplify right side
    258,681,200.55x = 100,373,945,276,983,984
  5. Step 5: Solve for x
    x = 100,373,945,276,983,984/258,681,200.55
  6. Step 6: Final answer
    x = 388,021,800.83

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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.