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Finding the Fourth Proportional to 411,864.80, 617,739.60 and 131,410.40

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Solution

The fourth proportional to 411,864.80, 617,739.60 and 131,410.40 is: 197,097.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,864.80 : 617,739.60 = 131,410.40 : x
  2. Step 2: Convert to fraction form
    411,864.80/617,739.60 = 131,410.40/x
  3. Step 3: Cross multiply
    411,864.80x = 617,739.60 × 131,410.40
  4. Step 4: Simplify right side
    411,864.80x = 81,177,407,931.84
  5. Step 5: Solve for x
    x = 81,177,407,931.84/411,864.80
  6. Step 6: Final answer
    x = 197,097.22

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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.