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Finding the Fourth Proportional to 289,611.20, 434,546.40 and 131,758.40

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Solution

The fourth proportional to 289,611.20, 434,546.40 and 131,758.40 is: 197,696.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,611.20 : 434,546.40 = 131,758.40 : x
  2. Step 2: Convert to fraction form
    289,611.20/434,546.40 = 131,758.40/x
  3. Step 3: Cross multiply
    289,611.20x = 434,546.40 × 131,758.40
  4. Step 4: Simplify right side
    289,611.20x = 57,255,138,389.76
  5. Step 5: Solve for x
    x = 57,255,138,389.76/289,611.20
  6. Step 6: Final answer
    x = 197,696.56

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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.