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Finding the Fourth Proportional to 280,291.08, 420,460.90 and 80,627.70

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Solution

The fourth proportional to 280,291.08, 420,460.90 and 80,627.70 is: 120,948.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,291.08 : 420,460.90 = 80,627.70 : x
  2. Step 2: Convert to fraction form
    280,291.08/420,460.90 = 80,627.70/x
  3. Step 3: Cross multiply
    280,291.08x = 420,460.90 × 80,627.70
  4. Step 4: Simplify right side
    280,291.08x = 33,900,795,306.93
  5. Step 5: Solve for x
    x = 33,900,795,306.93/280,291.08
  6. Step 6: Final answer
    x = 120,948.53

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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.