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Finding the Fourth Proportional to 411,980.80, 617,971.20 and 131,526.40

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Solution

The fourth proportional to 411,980.80, 617,971.20 and 131,526.40 is: 197,289.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,980.80 : 617,971.20 = 131,526.40 : x
  2. Step 2: Convert to fraction form
    411,980.80/617,971.20 = 131,526.40/x
  3. Step 3: Cross multiply
    411,980.80x = 617,971.20 × 131,526.40
  4. Step 4: Simplify right side
    411,980.80x = 81,279,527,239.68
  5. Step 5: Solve for x
    x = 81,279,527,239.68/411,980.80
  6. Step 6: Final answer
    x = 197,289.60

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Similar ratio
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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.