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Finding the Fourth Proportional to 638,863,208.55, 958,294,812.83 and 638,863,208.55

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Solution

The fourth proportional to 638,863,208.55, 958,294,812.83 and 638,863,208.55 is: 958,294,812.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,863,208.55 : 958,294,812.83 = 638,863,208.55 : x
  2. Step 2: Convert to fraction form
    638,863,208.55/958,294,812.83 = 638,863,208.55/x
  3. Step 3: Cross multiply
    638,863,208.55x = 958,294,812.83 × 638,863,208.55
  4. Step 4: Simplify right side
    638,863,208.55x = 612,219,298,861,395,456
  5. Step 5: Solve for x
    x = 612,219,298,861,395,456/638,863,208.55
  6. Step 6: Final answer
    x = 958,294,812.83

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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.