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Finding the Fourth Proportional to 411,783.60, 617,721.48 and 131,237.04

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Solution

The fourth proportional to 411,783.60, 617,721.48 and 131,237.04 is: 196,870.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,783.60 : 617,721.48 = 131,237.04 : x
  2. Step 2: Convert to fraction form
    411,783.60/617,721.48 = 131,237.04/x
  3. Step 3: Cross multiply
    411,783.60x = 617,721.48 × 131,237.04
  4. Step 4: Simplify right side
    411,783.60x = 81,067,938,579.62
  5. Step 5: Solve for x
    x = 81,067,938,579.62/411,783.60
  6. Step 6: Final answer
    x = 196,870.25

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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.