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Finding the Fourth Proportional to 200,388,915.90, 280,947,590.10 and 200,388,915.90

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Solution

The fourth proportional to 200,388,915.90, 280,947,590.10 and 200,388,915.90 is: 280,947,590.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,388,915.90 : 280,947,590.10 = 200,388,915.90 : x
  2. Step 2: Convert to fraction form
    200,388,915.90/280,947,590.10 = 200,388,915.90/x
  3. Step 3: Cross multiply
    200,388,915.90x = 280,947,590.10 × 200,388,915.90
  4. Step 4: Simplify right side
    200,388,915.90x = 56,298,783,004,856,576
  5. Step 5: Solve for x
    x = 56,298,783,004,856,576/200,388,915.90
  6. Step 6: Final answer
    x = 280,947,590.10

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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.