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Finding the Fourth Proportional to 280,940.28, 421,452.30 and 103,433.64

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Solution

The fourth proportional to 280,940.28, 421,452.30 and 103,433.64 is: 155,165.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,940.28 : 421,452.30 = 103,433.64 : x
  2. Step 2: Convert to fraction form
    280,940.28/421,452.30 = 103,433.64/x
  3. Step 3: Cross multiply
    280,940.28x = 421,452.30 × 103,433.64
  4. Step 4: Simplify right side
    280,940.28x = 43,592,345,475.37
  5. Step 5: Solve for x
    x = 43,592,345,475.37/280,940.28
  6. Step 6: Final answer
    x = 155,165.88

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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.