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Finding the Fourth Proportional to 638,801.45, 958,297.88 and 206,374.42

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Solution

The fourth proportional to 638,801.45, 958,297.88 and 206,374.42 is: 309,592.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,801.45 : 958,297.88 = 206,374.42 : x
  2. Step 2: Convert to fraction form
    638,801.45/958,297.88 = 206,374.42/x
  3. Step 3: Cross multiply
    638,801.45x = 958,297.88 × 206,374.42
  4. Step 4: Simplify right side
    638,801.45x = 197,768,168,140.36
  5. Step 5: Solve for x
    x = 197,768,168,140.36/638,801.45
  6. Step 6: Final answer
    x = 309,592.55

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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.