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Finding the Fourth Proportional to 289,803.52, 434,706.78 and 131,921.56

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Solution

The fourth proportional to 289,803.52, 434,706.78 and 131,921.56 is: 197,883.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,803.52 : 434,706.78 = 131,921.56 : x
  2. Step 2: Convert to fraction form
    289,803.52/434,706.78 = 131,921.56/x
  3. Step 3: Cross multiply
    289,803.52x = 434,706.78 × 131,921.56
  4. Step 4: Simplify right side
    289,803.52x = 57,347,196,560.18
  5. Step 5: Solve for x
    x = 57,347,196,560.18/289,803.52
  6. Step 6: Final answer
    x = 197,883.02

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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.