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Finding the Fourth Proportional to 280,879.60, 422,068.20 and 154,620.40

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Solution

The fourth proportional to 280,879.60, 422,068.20 and 154,620.40 is: 232,342.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,879.60 : 422,068.20 = 154,620.40 : x
  2. Step 2: Convert to fraction form
    280,879.60/422,068.20 = 154,620.40/x
  3. Step 3: Cross multiply
    280,879.60x = 422,068.20 × 154,620.40
  4. Step 4: Simplify right side
    280,879.60x = 65,260,353,911.28
  5. Step 5: Solve for x
    x = 65,260,353,911.28/280,879.60
  6. Step 6: Final answer
    x = 232,342.80

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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.