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Finding the Fourth Proportional to 280,445.68, 420,694.97 and 217,336.49

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Solution

The fourth proportional to 280,445.68, 420,694.97 and 217,336.49 is: 326,025.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,445.68 : 420,694.97 = 217,336.49 : x
  2. Step 2: Convert to fraction form
    280,445.68/420,694.97 = 217,336.49/x
  3. Step 3: Cross multiply
    280,445.68x = 420,694.97 × 217,336.49
  4. Step 4: Simplify right side
    280,445.68x = 91,432,366,036.98
  5. Step 5: Solve for x
    x = 91,432,366,036.98/280,445.68
  6. Step 6: Final answer
    x = 326,025.23

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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.