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Finding the Fourth Proportional to 308,949.60, 463,078.80 and 131,426.40

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Solution

The fourth proportional to 308,949.60, 463,078.80 and 131,426.40 is: 196,992.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,949.60 : 463,078.80 = 131,426.40 : x
  2. Step 2: Convert to fraction form
    308,949.60/463,078.80 = 131,426.40/x
  3. Step 3: Cross multiply
    308,949.60x = 463,078.80 × 131,426.40
  4. Step 4: Simplify right side
    308,949.60x = 60,860,779,600.32
  5. Step 5: Solve for x
    x = 60,860,779,600.32/308,949.60
  6. Step 6: Final answer
    x = 196,992.58

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1.5x scale

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.