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Finding the Fourth Proportional to 280,606.20, 420,909.30 and 250,279.80

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Solution

The fourth proportional to 280,606.20, 420,909.30 and 250,279.80 is: 375,419.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,606.20 : 420,909.30 = 250,279.80 : x
  2. Step 2: Convert to fraction form
    280,606.20/420,909.30 = 250,279.80/x
  3. Step 3: Cross multiply
    280,606.20x = 420,909.30 × 250,279.80
  4. Step 4: Simplify right side
    280,606.20x = 105,345,095,422.14
  5. Step 5: Solve for x
    x = 105,345,095,422.14/280,606.20
  6. Step 6: Final answer
    x = 375,419.70

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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.