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Finding the Fourth Proportional to 280,251.21, 420,542.90 and 262,519.10

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Solution

The fourth proportional to 280,251.21, 420,542.90 and 262,519.10 is: 393,934.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,251.21 : 420,542.90 = 262,519.10 : x
  2. Step 2: Convert to fraction form
    280,251.21/420,542.90 = 262,519.10/x
  3. Step 3: Cross multiply
    280,251.21x = 420,542.90 × 262,519.10
  4. Step 4: Simplify right side
    280,251.21x = 110,400,543,619.39
  5. Step 5: Solve for x
    x = 110,400,543,619.39/280,251.21
  6. Step 6: Final answer
    x = 393,934.23

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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.